Class 6

AP State Syllabus AP Board 6th Class Science Important Questions Chapter 6 Fun with Magnets

AP State Syllabus 6th Class Science Important Questions 5th Lesson Fun with Magnets

6th Class Science 6th Lesson Fun with Magnets 2 Mark Important Questions and Answers

Question 1.
Explain why do pins get attached to the cap of the pin holder.
Answer:
Pins get attached to the cap of the pin holder because it contains a magnet.

Question 2.
Why the natural magnets are called leading stones?
Answer:
Natural magnets are used for finding direction, So they are also called ‘leading stones’ or ‘lode stones’.

Question 3.
From which part of the magnet do you feel more difficulty in removing iron filings?
Answer:
I felt more difficulty in removing iron filings from the poles of the magnet.

Question 4.
What property of the magnet is used to make the magnetic compass?
Answer:
The directional property of the magnet is used to make the magnetic compass.

Question 5.
What is the important precaution you have to take with the magnetic compass?
Answer:
The magnetic compass and magnets should not be put together.

Question 6.
What will happen to the magnet when we cut it into two pieces?
Answer:
When we cut a bar magnet into two pieces, both these pieces act as magnets and we get two magnets.

Question 7.
How can you separate metal scrap from a heap of waste materials in a scrap yard?
Answer:
We can separate metal scrap from a heap of waste materials in a scrap yard with the help of magnets.

Question 8.
You are given a bar magnet How will you find out the west direction?
Answer:
The two poles of a bar magnet point towards the north and south direction, so the west direction can be easily located.

Question 9.
A carpenter by chance mixes iron nails and screws with wood shavings while working. How can you help him in getting back the nails and screws from the wood shavings?
Answer:
We can’ help him in getting back the nails and screw from wood shavings with the help of a magnet.

Question 10.
What is magnetic induction?
Answer:
The magnetic property possessed by a magnetic substance due to the presence of a magnet near it is called ‘magnetic, induction’.

Question 11.
What is the sure test for magnetism?
Answer:
Repulsion and not attraction is the sure test for magnetism.

Question 12.
What is meant by the directional property of magnets?
Answer:
A freely suspended magnet always come to rest in north and south directions. This property of magnets is called a directional property.

Question 13.
On what principle electromagnetic trains work?
Answer:
Electromagnetic trains work on the principle that – Magnetic objects can levitate by using repulsion.

Question 14.
Draw the diagram of the horseshoe magnets.
Answer:

6th Class Science 6th Lesson Fun with Magnets 4 Mark Important Questions and Answers

Question 1.
What are magnetic and non magnetic materials? Give examples.
Answer:

1. The materials that are attracted by magnets are called magnetic materials.
2. Examples: Iron, Steel, Cobalt, etc.
3. The materials that are not attracted by magnets are called non-magnetic substances.
4. Examples: Brass, Plastic, Wood, Paper, etc.

Question 2.
Which part of the bar magnet attracts more iron filings? What do you conclude from this?
Answer:

1. The ends of the bar magnet attract more iron filings than the middle part of the magnet.
2. We conclude that every bar magnet always has two ends whose attracting capacity is more than its other parts.
3. These ends are called ‘Poles’ of the magnet.

Question 3.
When do magnets attract each other?
Answer:

1. When two bar magnets with their opposite poles are placed side by side at a small distance the magnets attract each other.
2. Opposite poles of the magnets attract.

Question 4.
When do the magnets repel each other?
Answer:

1. When two magnets with their like poles are placed side by side at a small distance the magnets repel each other.
2. Like poles of the magnets repel.

Question 5.
Fill up the following table.

Answer:

Question 6.
How is a compass used to find directions?
Answer:

1. A compass has a magnetic needle attached to it which can rotates freely.
2. The magnet always points to N – S direction which is marked on compass and thus help in finding direction.

Question 7.
Why is compass needle kept in a closed glass vessel?
Answer:

1. The compass needle is a small and thin magnet used to find the direction.
2. If it is kept in open, it may deflect in any direction.
3. So to know right direction, it is kept covered by glass covering.

Question 8.
What is the use of a magnetic compass?
Answer:

1. A magnetic compass is used to find directions.
2. It is mostly used in ships and airplanes.
3. Mountaineers and army people also carry a compass with them so that they do not lose their way in an unknown place.

Question 9.
Rajani needs some iron filings to conduct experiments with magnets. She don’t know how to collect them. Help her by explaining the process of collecting iron filings?
Answer:

1. In the experiments with magnets, we need to use iron filings again and again.
2. We can collect these by placing a magnet in a pile of sand and turning it around in the sand.
3. The small pieces of iron present in the sand will stick to the magnet.
4. If we cannot find sand we can look for iron pieces in clay soil as well.

Question 10.
‘Like poles repel each other and unlike poles attract each other” – How can you prove this statement?
Answer:

1. Take two similar bar magnets.
2. Bring the south pole of a bar magnet close to the south pole of another bar magnet. They repel each other.
3. Now bring the north pole of a bar magnet close to the north pole of another bar magnet. They also repel each other. This confirms like poles repel each other.
4. Now bring the south pole of a bar magnet to the north pole of another bar magnet, vice versa. They attract each other confirming that unlike poles attract each other.

Question 11.
How do the properties of magnets get destroyed?
Answer:

1. Magnets lose their properties if they are heated or dropped from a height or hit with a hammer.
2. Magnets lose their properties when they are placed near Cell phone, Computer, DVDs.
3. Improper storage can also cause magnets to lose their properties.

Question 12.
Write the cations for the proper storage of magnets.
Answer:

1. Improper storage can cause magnets to lose their properties.
2. To keep them safe, bar magnets should be kept in pairs with their unlike poles on the same side.
3. They must be separated by a piece of wood and two pieces of soft iron should be placed across their ends.
4. For a horse-shoe magnet a single piece of soft iron can be used as a magnetic keeper across the poles.

Question 13.
What is a suspension train? On what principle it works?
Answer:

1. An Electromagnetic train is called a suspension train or a flying train.
2. It does not require either diesel or petrol.
3. This technology uses the property of magnetic attraction and repulsion to run these super fast electromagnetic trains.
4. Electromagnetic train work on the principle of magnetic levitation. That is – A magnetic object can levitate by using repulsion.

Question 14.
Write the differences between natural magnets and artificial magnets.
Answer:

6th Class Science 6th Lesson Fun with Magnets 8 Mark Important Questions and Answers

Question 1.
Describe the story of the discovery of magnets?
Answer:

1. About 2500 years back in a place named magnesia in Greek, there lived a shepherd named Magnus.
2. One day while his goats were grassing he took a hap on a rock by keeping his iron caped stick and iron nailed boots on that rock.
3. When he woke up, he found that his iron-capped stick stuck on the rock and stood erect. His iron-nailed boots also stuck on the fock.
4. The entire village assembled there to see this magic.
5. People wondered about this incident, each and everyone expressed their views in different ways.
6. People found it attractive not only the stick of Magnus but also all other materials made of iron.
7. more rocks of these kinds were found worldwide.
8. These magnetic rocks were named ‘Magnets’ and the ore is called ‘Magnetite’ after the name of the boy Magnus.

Question 2.
Describe the construction of a magnetic compass. How is it used? What are its uses? (Imp.)
Answer:
Magnetic Compass:
Description:

1. A compass is usually a small box with glass covering it.
2. A magnetized needle is pivoted inside the box in such a way that it can rotate freely.
3. The compass also has a dial with directions marked on it.

Working with Compass:

1. The compass is kept at the place where we wish to know the direction.
2. Its needle indicates the North-South direction when it comes to rest.
3. The compass is then rotated until the north and south marked on the dial are exactly below the two ends of the needle.
4. To identify the North pole of the magnetic needle, it is usually painted in a different color (see Fig.).
   
5. Then we identify north and south at that place.
6. After that we can also identify the East and West between them.

Uses:

1. A compass is used to find directions and in ships & airplanes.
2. Mountaineers and army people also carry a compass with them so that they do not lose their way in an unknown place.

Question 3.
Observe the picture and answer the following questions.

a) What are the materials required to do this experiment?
b) What precautions you would take while doing this experiment?
c) In which direction the magnet show when it stands rest?
d) What is the instrument made based on this experiment/property?
Answer:
a) Required material:

1. Bar magnet
2. Thread
3. Stand

b) Suspend the bar magnet freely with help of a strong thread tied to the center of the bar magnet.
c) North-South direction.
d) Magnetic compass.

Question 4.
i) According to the pictures write whether rat attracts or repels to the food in the bowl.
ii) Give reasons.

Answer:
A) Rat attracts to the food in the bowl.  Reason: Unlike poles attract each other.
B) Rat repels to the food in the bowl. Reason: Like poles repel each other.
C) Rat attracts to the food in the bowl. Reason: Unlike poles attract each other.
D) Rat repels to the food in the bowl. Reason: Like poles repel each other.

Question 5.
Observe the picture.

i) Identify the name of the picture.
ii) In which direction the magnet needle show when it comes to rest?
iii) What property of the magnet is used to make the instrument?
iv) What is the use of that Instrument?
Answer:
i) Magnetic, compass.
ii) North-South direction.
iii) The directional property of the magnet is used to make the magnet compass.
iv) We use it to find out the direction.

Question 6.
How do you find whether the given object is a magnet or not? You are given three objects of the same size, shape, and color and a bar magnet. Describe your activity.
Answer:
The procedure of the activity:
I bring three objects one after the other close to one pole of the bar magnet and observe whether they get attracted, repelled, or not attracted.
Conclusions:

1. If an object is attracted by one pole of the bar magnet and repelled by its other pole, then I can say that it is a magnet.
2. If an object is attracted by both the poles of a bar magnet and not repelled by any
   pole, then I can say that it is not a magnet but a magnetic substance.
3. If an object is neither attracted by a magnet nor repelled by it, then I can say that it is neither a magnet nor a magnetic substance.

Question 7.
Write a short note on the properties of magnets.
Answer:

1. Magnets attract magnetic materials.
2. A magnet always has two ends whose attracting capacity is more than the parts of it. The poles of the magnet lie at these birds.
3. Each magnet has two magnetic poles: North and South.
4. Like Poles (N-N, S-S) repel each other and unlike poles (N-S, S-N) attract each other.
5. A freely suspended magnet always aligns in the North-South direction.
6. Magnets lose their properties if they are heated or dropped from a height hit with a hammer.

Question 8.
How can you prove that a bar magnet possesses two poles?
Answer:
Aim: To prove that a bar magnet possesses two poles.

What do you need? (Materials required): Iron filings, a sheet of paper, bar magnet.
What to do? (Procedure):

1. Spread some iron fillings uniformly on a sheet of paper.
2. Place a bar magnet below this sheet.

What do you see? (Observation):

1. We will notice that the uniformly spread iron filings come close and get concentrate at two points of the paper sheet.
2. At some distance, we will find some scattered iron filings between these two points.

What do you learn? (Result): Thus the ends of the bar magnet attract more iron filings than the middle part of the magnet. By this activity we can conclude that every bar magnet always has two ends whose attracting capacity is more than its other parts. These ends are called poles of the magnet.

Question 9.
How can you demonstrate the directional property of a bar magnet?
Answer:
Aim: To demonstrate the directional property of a bar magnet.
What do you need? (Materials required): Bar magnet, thread, stand and colour.
What to do? (Procedure):

1. Suspend the bar magnet freely with the help of a thread tied around its center.
   
2. The magnet finally takes a position in the North-South direction.
3. Mark the end points towards the North with some color.
4. Now disturb the magnet and again wait for some time.

What do you see? (Observation):
Magnets always come to rest in the North-South direction. In each case the marked endpoints towards North.
What do you learn? (Result): The marked end is known as the North pole of the magnet. The other end, which points towards the South is known as the South pole of the magnet. This property of magnets is called directional property.

Question 10.
Draw different shapes of magnets available in your area.
Answer:

AP State Syllabus AP Board 6th Class Science Important Questions Chapter 11 Shadows – Images

AP State Syllabus 6th Class Science Important Questions 11th Lesson Shadows – Images

6th Class Science 11th Lesson Shadows – Images 2 Mark Important Questions and Answers

Question 1.
What is the need of light?
Answer:
We need light to see objects.

Question 2.
What is light of source?
Answer:
Substance which gives light is known as a source of light.

Question 3.
When the shadows are formed?
Answer:
Shadows are formed when opaque objects obstruct the path of light.

Question 4.
What we need to obtain shadow?
Answer:
In addition to light and object we also need a screen to obtain the shadow of an opaque object.

Question 5.
Are you guess the colour of object by its shadow?
Answer:
The colour of objects cannot be determined by looking at their shadows.

Question 6.
How the light travels?
Answer:
Light travels in a straight line.

Question 7.
When the light reflected?
Answer:
Light gets reflected when it falls on any object.

Question 8.
How do the people know that light travels in a straight line?
Answer:
People came to an understanding that light travels in a straight line by observing the shapes of shadows.

Question 9.
Why am I not able to see the objects clearly when it gets dark?
Answer:
In the dark light is not sufficient to see the objects.

Question 10.
Why am I not able to see the objects when the power goes off?
Answer:
When the power goes off light is absent. So we can’t see the objects.

Question 11.
How are we able to see the objects in the presence of light?
Answer:
The light reflects eyes that fell on objects. So we are able to see the objects.

Question 12.
Why are we not able to see the objects in the absence of light?
Answer:
Light is the source of visible since. So without light, we can’t see anything.

Question 13.
What are the conditions to form a shadow?
Answer:
We need a source of light and an opaque object and a screen to get a shadow.

Question 14.
How in ancient days, people came to an understanding that light travels in a straight line?
Answer:
In ancient days, by observing the shapes of shadows people came to an understanding that light travels in a straight line.

6th Class Science 11th Lesson Shadows – Images 4 Mark Important Questions and Answers

Question 1.
How can we see the objects?
Answer:

1. When we put on the bulb, light falls on the object, bounces from the object and reaches us.
2. We can see an object only when light falls on it and bounces back to our eyes.
   
3. The object is visible when there is no obstruction between your eyes and the object.
4. It means light travels in straight lines.

Question 2.
How do you classify the objects according to light traveling through them?
Answer:

1. The substances like paper, plank, wood, iron, etc. don’t allow light to pass through them. These objects form shadows. These are called opaque substances.
2. The substances like glass and air allow light to pass through them and hence we don’t get their shadows. Such substances are called transparent substances.
3. The substances such as polyethylene cover and oily paper partially allow the light to pass through them. Their shadows are unclear. These substances.

Question 3.
Write about shadow puppet?
Answer:

1. Shadow puppetry is one of our traditional recreational activities.
2. In this, some puppets are used to form shadows on a screen and a story is narrated with the help of these shadows.
   
3. By using this art old epics like Ramayana and Maha Bharat were played.
4. Now a days this old art losses its glow.

Question 4.
Write the difference between opaque and transperent substances?
Answer:
Opaque: An object which does not allow light to pass through it and you are not able to see the objects behind your opaque material.
Transparent: An object that allows light to pass through it and you can see the objects behind your transparent material.

Question 5.
Vivek said that light and object are enough to form a shadow? Are you agree with him?
Answer:
No. I can’t agree with this statement. I understand that only light and an opaque object are not enough to form the shadow of an object. In addition to these, we need a screen.

Question 6.
Can we guess the object by observing its shadow?
Answer:

1. Mostly we guess the object by observing its shadow.
2. But it is not always possible.
3. Sometimes the shadow may differ from the shape of the object.
4. Because of light source position and shape of the object.

Question 7.
What is a pinhole camera?
Answer:
It is a small instrument that works on the light.
With this camera, we can observe a big object through a pinhole.
On the screen, it forms a little reverse image without a lance.
The nature of the straight-line motion of light can also be understood by this one.

Question 8.
Look at a tree through the pinhole camera. What do you see?
Answer:
When I observe the tree in the pinhole camera

1. the image is small.
2. it is inverted on the screen.
3. it is colorful.
4. and appear near to me.

Question 9.
Predict what would happen if we make two pin-holes in the camera?
Answer:

1. If we make two pin-holes in the camera I predict that images are not clear.
2. But it is a wonder that it forms two images, both are clear.

Question 10.
We see our faces in the mirror every day. Is the picture in the mirror a shadow or an image? How did you decide that?
Answer:

1. The picture in the mirror is an image.
2. We know that shadows are not colored but an image has colors that are the same as that of the object.
3. A shadow shows only the outline of the object but an image shows the complete object as it is, just like a photograph.
4. The picture in the mirror has color and shows a complete object. So its an imaged

Question 11.
Can you show the difference between a shadow and an image through a drawing?
Answer:
Yes, we can show the difference between shadows and images through a drawing.

1. In images, we can use color and draw the whole picture.
2. Whereas in shadows we draw only outline and fill with black.

6th Class Science 11th Lesson Shadows – Images 8 Mark Important Questions and Answers

Question 1.
How do you prove that screen is necessary to form shadow?
Answer:
Aim: To prove that screen is necessary to form shadow.
Materials: Torch, leaf, darkroom, drawing sheet, or plank.
Procedure:

1. Do this activity in a dark room with a torch and a leaf.
2. Focus the light on the leaf with a torch.
3. Keep the distance about 30 cm between the leaf and the torch.
   
4. Now the shadow is formed in the wall.
5. Now put the torch under the leaf at a distance of about 30cm.
6. Now the shadow is formed on the roof.
7. Do the same activity, in the open air (outside) at night.
8. Now we can’t find any shadow outside.
   
9. Place a drawing sheet or a plank at a distance of 1 m. above
10. Now we can find a shadow on the drawing sheet.
11. It means the screen is needed to form shadows.

Conclusion: It is proved that screen is needed to form shadows.

Question 2.
Write the process of making a pinhole camera? (Activity – 6)
Answer:
Aim: Making a pin-hole camera.
Materials: A PVC pipe, about 8 cm in diameter and of length 30 cm.
A PVC pipe, about 7 cm in diameter and of length 20 cm.
One black drawing sheet. Oil -1 ml, two rubber bands, a pin, and A4 Sheet. (If you cannot get PVC pipes, take a thick sheet of paper and roll it to form tubes. The diameter and length of the tubes should be the same as that given for the pipes.)
Procedure:

1. Cut a piece of black paper and put it like a cap at one end of the big pvc pipe and fix it with a rubber band as shown in the figure.
   
2. Put the white paper like a cap at one end of the thinner PVC pipe.
3. Fix it with a rubber band, now make a hole in the middle of the black paper cap with the help of a pin.
4. Put 2 to 3 drops of oil on the white paper cap so that it becomes translucent.
5. Insert the thin pipe into the big pipe. Your pinhole camera is ready

Working:

1. Arrange a lighted candle in front of the pinhole of the camera.
   
2. Move the thinner pipe forward and backward to get a clear picture of the candle on the screen of the thin pipe.
3. This picture is to be observed from the back of the thin pipe.
   Observation: The flame of the candle appears inverted on the screen. This is not the shadow of the candle. It is its image.

Question 3.
Why the image in the pinhole camera is inverted?
Answer:

1. The light from the candle travels straight in all directions from each point of the flame of the candle.
2. But only the light coming in some particular directions can enter into the camera through its pin-hole.
   
3. The light that comes from the point at the top of the flame goes straight towards the bottom of the screen.
4. And the light that comes from the point at the bottom of the flame goes straight towards the top of the screen.
5. In this way, the light coming in a particular direction from each point of the flame will be able to enter into the pin-hole.
6. And light going in other directions is blocked by the black sheet.
7. This leads to the formation of an inverted image.
8. The formation of an inverted image on the screen of the pinhole camera explains that light travels in a straight line.

AP State Syllabus AP Board 6th Class Science Important Questions Chapter 10 Basic Electric Circuits

AP State Syllabus 6th Class Science Important Questions 10th Lesson Organisms and Habitat

6th Class Science 10th Lesson Organisms and Habitat 2 Mark Important Questions and Answers

Question 1.
What does a cell contain?
Answer:
A cell contains some chemical substances which can produce electricity with two terminals.

Question 2.
Many times in our houses we observe that though electricity is available some bulbs glow and some don’t glow. What could be the reason for that?
Answer:
The filament might have been fused off.

Question 3.
What is current?
Answer:
The flow of electricity in a circuit is called current.

Question 4.
Do not connect the two terminals of a cell with a single wire. Give reason.
Answer:

1. We should never connect the two terminals of a cell with a single wire.
2. If we do so, the chemicals in the cell get used up very fast and the cell stops working.

Question 5.
What is filament?
Answer:
The part of the bulb that glows is the filament, which is a thin spring-like wire attached to the two metal wires inside the glass bulb.

Question 6.
What is the switch?
Answer:
The switch is a device used to close or open an electric circuit.

Question 7.
What is the purpose of a switch?
Answer:
We use switches to put ON or put OFF the torchlight.

Question 8.
Is our body insulator or conductor?
Answer:
Our body is a good conductor of electricity.

Question 9.
Why is the handle of the electrician’s screwdriver made of plastic?
Answer:

1. Plastic is a bad conductor and does not allow current to pass through it.
2. So, the electrician has a plastic handle to protect him from any shock.

Question 10.
What is the difference between our present bulbs and the Edison bulb?
Answer:

1. Today we use the same kind of bulbs as were first made by Edison.
2. The only difference is that our bulbs have a filament made of a metal called Tungsten.

6th Class Science 10th Lesson Organisms and Habitat 4 Mark Important Questions and Answers

Question 1.
What is the use of a switch in a circuit?
Answer:

1. The switch allows the flow of electricity when it is ON and cuts off the flow of electricity when it is OFF.
2. In this way, the switch is used to allow / stop the flow of electricity to the bulb or any other electrical device.
   Label the parts in the following figure.

Question 2.
Label the parts in the following figure.

Answer:
1. Glass chamber
2. Filament
3. Metal cap
4. Terminals

Question 3.
Match the following by seeing the figure.


Answer:
a – q,
b – r,
c – s,
d – p

Question 4.
Observe the following figure.

Does the bulb glow or not? Why?
Answer:

1. Yes, the bulb will glow.
2. Since the connections are
   perfectly done in the closed circuit.

Question 5.
Observe the following figure.

Does the bulb glow or not in the arrangement which shown in figure? Why?
Answer:

1. No, the bulb will not glow.
2. Here in this arrangement the circuit is not completed.
3. The handle of the screw is an insulator.

Question 6.
Would the bulb glow in the circuit shown in figure? Why?
Answer:

1. No, the bulb will not glow.
   
2. This is because an electric bulb glow up only when circuit is completed and eraser is a non – conducting material.

Question 7.
Give reasons for the following:
a) Electric wires are made of copper.
b) We should not operate electric switches with wet hands.
Answer:
a) Copper is a good conductor of electricity.
b) Water is a good conductor of electricity and we might get an electric shock.

Question 8.
What was the story of the bulb ? Who ultimately succeeded in making the first bulb?
Answer:

1. The story of invention of bulb is very interesting.
2. We may think that a bulb is a very sinjple gadget, just press a switch and it lights up.
3. But many scientists worked hard for many years before the first successful bulb was made.
4. One of them was Thomas Alva Edison who ultimately succeeded in making the first bulb.

Question 9.
What was the nature of Thomas Alva Edison?
Answer:

1. From childhood, Edison was of an inquisitive nature and he learned science by performing experiments himself.
   
2. We will be amazed to know that in his life time he invented more them one thousand inventions.
3. Even an intelligent scientist like Edison had to work hard for many years before he could make a bulb that worked.

Question 10.
Why do bulbs and cells have two terminals?
Answer:

1. Current needs a closed path in order to flow.
2. To form a closed path there should be two terminal – one for inlet and another for an outlet.
3. So in order to complete the circuit bulbs and cells have two terminals.

Question 11.
How does a bulb glow with the help of a cell?
Answer:

1. Cell is the source of energy that produces electricity from the chemical stored inside it.
2. When the terminals of the bulb are connected with that of the electric cell by wires, the current passes through the filament of the bulb.
3. As a result the filament gats heated up and emits the light.
4. This makes the bulb glow.

6th Class Science 10th Lesson Organisms and Habitat 8 Mark Important Questions and Answers

Question 1.
Describe the construction of a torch-bulb.
Answer:

1. A torch bulb consists of a glass chamber fixed on a metal base.
2. Two metal wires are firmly fixed.
   
3. One wire is attached to the metal cap and the other is attached to the base at the center of the metal cap.
4. These wires act as two terminals. The two terminals do not touch each other.
5. The part of the bulb that glows is the filament, which is a thin spring-like wire attached to the two metal wires inside the glass bulb.

Question 2.
How do you test when the electric bulb glows with a cell? Describe the activity you do with simple electric circuits.
Answer:
Aim: To test when do the electric bulb glows with a cell.
What do you need? (Materials required): Four wires of different colors each about 15 cm long, a bulb, a cell, a cello-tape or cell-holder
How to do? (Procedure):

1. Take four wires of different colors, say blue, green, red and yellow, each about 15 cm long.
2. Electric wires are often covered with plastic. First, remove about two centimeters of the plastic covering, from both ends of each wire.
3. Now attach two wires (Blue and Green) to a bulb and two Wires (Red and Yellow) to a cell with a cello-tape or cell-holder as shown in Fig.
4. We can use a cell holder to hold the cells and wires together tightly.
5. Now connect the wires in different forms as shown in Fig. 4(b) to 4(g).
   
6. In each case, check whether the bulb glows or not.
7. Record your observations in the table.
   

   Connection	Does the bulb glow (Yes / No)
   Fig (b)	No
   Fig (c)	No
   Fig (d)	Yes
   Fig (e)	Yes
   Fig (0	No
   Fig (g)	No

What do you see? (Observation): You may observe that the bulb glows in connections shown in Fig. 4(d) and Fig. 4(e), but not in other cases.
What do you learn? Result: We noticed that in Fig. (d) and Fig. 4(e) the connections form a closed path while in the remaining cases we find some gap in the path.

Question 3.
Write an activity showing the working of a switch in a circuit.
Answer:
Aim: To show the working of switch in a circuit.
What do you need? (Materials required: a cell (power source, a bulb, connecting wires, wooden plank or thermocol sheet, two drawing pins, and the materials provided to test.
How to do it? (Procedure):

1. Connect à èirÙit on a wooden plank or on a thermocol sheet as shown in Fig.
2. Insert two drawing pins at A and B.
   
3. Insert a safety pin in between A and B, such that one end of the pin is completely in contact wLth Rand the other end is left free.
4. Now observe the bulb.
5. Now touch the safety pin to pin A and observe the bulb again

What do you see? (Observation): The bulb doesn’t glow when the safety pin left free at one end. But it glows when the safety pin touches pin A.
What do you learn? (Result): In this activity, the safety pin is used to close /open the circuit. Similarly, An electric switch is an arrangement to close or open (break) a circuit. The switch allows the flow of electricity when it is on and cuts off the flow of electricity when it is off. In this way, the switch is used to allow/stop the flow of electricity to the bulb or any other electrical device.

Question 4.
Describe the trials of Edison to make a bulb.
Answer:

1. First of all, Edison passed electricity through a thin, thread-like platinum wire.
2. He noticed that the wire did give out the light after being heated, but it burned out after only a few seconds.
3. He made a glass casing and fitted a filament of platinum wire in it.
   
4. He then removed all the air from within the glass casing.
5. He passed an electric current through the wire and, to his delight, the bulb lit up and did not burn out for eight long minutes.
6. He began experimenting with different materials while searching for a better choice of filament.
7. He tried cotton thread coated with soot. This filament burned continuously for 45 hours.
8. He tried different kinds of thread.
9. Finally, he succeeded in making a cotton filament that was even better than the bamboo one.

Question 5.
Label the parts 1, 2, 3, 4, 5, 6, 7 and 8 in Torchlight.

Answer:

1. Hollow cylindrical barrel
2. Metal spring
3. Cells
4. Switch
5. Copper wire
6. Reflector
7. Glass
8. Bulb

Question 6.
Observe the given diagram.

Now answer the following questions.

1. In a bulb which part gives us light?
2. What is the use of a switch in a circuit?
3. What is the filament made of?
4. What does a torch consist of?
5. What is a source of electrical energy in a torchlight?
6. Which of the following acts as the negative terminal of a torchlight?

Answer:

1. Filament.
2. The switch helps us to allow or break the flow of current in a circuit.
3. Tungsten.
4. Torchlight consists of a cell, bulb, and switch.
5. Cell.
6. Zinc plate or Zinc container.

AP State Syllabus AP Board 6th Class Science Important Questions Chapter 5 Materials: Separating Methods

AP State Syllabus 6th Class Science Important Questions 5th Lesson Materials: Separating Methods

Question 1.
Name any five objects which are made up of only one material.
Answer:
The following objects are made up of only iron.

1. Iron pan
2. Iron lock
3. Iron key
4. Iron trunk
5. Iron cot
6. Iron crow bar
7. Bodkin (Iron)
8. Blowpipe (Iron).

Question 2.
Name any five objects which are made up of more than two materials.
Answer:

1. Pen (Plastic + Metal)
2. Cycle (Steel + Iron + Rubber)
3. Scissors (Steel + Plastic top)
4. Mirror (Glass + Metal frame)
5. Axe (Iron + Wooden handle)
6. Table (Wood + Steel)

Question 3.
With what material is your pen made?
Answer:
My pen is made of plastic, whereas its clip is made of iron.

Question 4.
How do we decide which material should be used for making an object?
Answer:
Depending upon the use and purpose they serve, we decide which material should be used for making an object.

Question 5.
What are soluble substances?
Answer:
Substances which dissolve in water are said to be soluble substances.

Question 6.
Select those objects from the following which are made up of plastic.
Table, mug, utensils, chair, iron gate, wood, cotton shirt, plastic toy, pen, computer
Answer:
Table, mug, utensils, chair, plastic toy, pen, computer.

Question 7.
Write two substances that are made from leather.
Answer:

1. Belt and
2. shoes.

Question 8.
List out any 5 items that float on water.
Answer:
List of 5 items that float on water:

1. Paper
2. Wood
3. Wax
4. Ice
5. Oil

Question 9. (You might come across some situations where you have to separate some components from a mixture. Write down two examples of such situations.
1. …………………………
2. …………………………
Ex: 1) Rice and small stones. 2) Muddy water.
What do you do to separate the components?
Answer:

1. Rice and small stones are separated by handpicking.
2. Muddy water is filtered with filter paper.

Question 10.
How are stones separated from pulses and rice?
Answer:
Stones are separated by handpicking from rice and pulses.

Question 11.
Give some examples of the handpicking method of separation.
Answer:
Examples for handpicking method of separation:

1. Rotten fruits are removed from fresh fruits.
2. Separating oranges and apples.

Question 12.
When can winnowing be used?
Answer:
Winnowing can be used to separate lighter and heavier components of a mixture. Eg: To
separate husk from grain with the help of air.

Question 13.
Where do we use the chromatography method?
Answer:
We use chromatography to separate colours or pigments from their mixtures.
Ex: 1. To separate colours from ink.
2. To separate colouring pigments from the leaf extract, etc.

Question 14.
Identify the mixtures among the following:
Jangree, coffee, sand, haldi, red chilli.
Answer:
Mixtures:

1. Jangree
2. Coffee
3. Sand with impurities
4. Haldi with impurities.

Question 15.
Can you filter mud water with filter paper?
Answer:
Yes, we can filter the mud water with filter paper.

Question 16.
Is the water clean after the mud water is sieved with filter paper?
Answer:
The mud water filtered after using the filter paper is clean.

Question 17.
Are you able to separate the salt from the saltwater with filter paper?
Answer:
We cannot separate the salt from the saltwater with filter paper.

Question 18.
A solid substance is dissolved in water which method is used for separating it?
Answer:
Filtration.

Question 19.
20. Name the process by which water is separated from rice and pulses after washing them.
Answer:
Sedimentation.

Question 20.
Which process is used to separate a mixture of camphor and salt?
Answer:
Sublimation is the process that is used to separate the mixture of camphor and salt.

Question 21.
How do farmers use sieving?
Answer:
Farmers separate grains which are bigger in size from the smaller ones by sieving. The bigger grains are then used as seeds or sold at a higher price.

Question 22.
What is filter paper? How is it useful?
Answer:
Filter paper is a sieve made of paper that has very fine holes. We can filter very small particles using this type of sieve.

Question 23.
What is sublimation?
Answer:
The process in which a substance changes directly from solid to gaseous form and vice-versa is called sublimation.

Question 24.
What is Chromatography?
Answer:
The process of separating colours from a mixture of colours is called chromatography.

6th Class Science 5th Lesson Materials: Separating Methods 4 Mark Important Questions and Answers

Question 1.
Give a list of objects which would be broken and which might not be broken when they fall on the floor.
Answer:

Question 2.
How do you sort materials as solids, liquids and gases? Write your answer with an example.
Answer:
1) We sort materials as solids, liquids and gases based on their state at normal temperature.

Question 3.
Can you think of any material other than ice that goes from solid to liquid, liquid to gas (vapour)?
Answer:

1. Many materials change their state from solid to liquid and from liquid to gas.
2. Ghee at slightly low temperature will be in solid state.
3. If it is heated it comes to liquid state and on further heating it becomes vapour.

Another example:

1. At room temperature candle wax will be in solid state (candle).
2. When it is lighted it starts burning and liquid wax is seen at the wick of the candle.
3. The white smoke on the top of the wick is wax vapour.

Question 4.
What are the properties of solids and liquids?
Answer:

1. The materials which do not change shape are solids.
   Example: Wood, rock, brick, plastic objects, vegetables … etc.
2. The materials which change shape are liquids.
   Example: Water, rasam, milk, kerosene, oil… etc.

Question 5.
Explain the terms ‘soluble’ and ’insoluble’ with reference to water.
Answer:

1. Substances that get dissolved in water are called soluble substances.
2. Substances that do not dissolve in water are called insoluble substances.

Question 6.
Can you make a cricket ball, with mud or glass?
Answer:

1. We cannot make a cricket baH with mud or glass.
2. If that ball is struck with the bat it breaks into pieces.
3. This ball cannot withstand hard strokes.

Question 7.
Can you make a chair with glass or mud? If not why?
Answer:

1. No. We cannot make a chair with glass or mud.
2. Both are brittle materials and can be broken easily.

Question 8.
Give two examples for soluble and insoluble substances in water
Answer:

1. Soluble substances in water: 1) Sugar 2) Salt
2. Insoluble substances in water: 1) Wood 2) Sand

Question 9.
Create table of objects different types that are made from the same material.
Answer:

Question 10.
Kiran observed his father separating husk and grains by winnowing method in the field and appreciated how wind flow helped in separation. On evaporation, salt is formed from seawater. Isn’t it? How would you appreciate this process?
Answer:

1. The flowing wind carries the lighter husk with it and the heavy grains fall vertically downwards.
2. This winnowing is done with the help of flowing wind which is nature’s gift.
3. Similarly, the evaporation of seawater leaves salt for us. This is done with the help of sunlight. This is also nature’s gift.

Question 11.
When farmers thresh their crops, they get a mixture of husk and grain. How do the farmers separate the husk from the grains?
Answer:

1. On a windy day, a farmer stands on a high platform and allows the mixture of grain and husk to drop slowly from the flat Pan.
   
2. The wind carries the husk forward and the grips fall vertically downward.
3. A separate heap of grain is formed.

Question 12.
How will you separate the tea leaves from tea? Which property helped in the separation of tea leaves from tea?
Answer:

1. Tea leaves are separated from tea using a strainer.
2. The size of the tea leaves is more when compared to the size of the holes in the Strainer.
   This property helped in the separation of tea leaves from the tea.

Question 13.
Laxmi says that sedimentation and decantation are used at home while cleaning rice and pulses for cooking. Describe the sediments in this process.
Answer:

1. While cleaning rice we wash rice with water. Rice settles down in the water as sediments and the lighter impurities float. This is called sedimentation.
2. The water gets separated from the sediment (rice). This process is called decantation.
3. The same process takes place while washing pulses.

Question 14.
We use sieves to separate tea leaves from tea and sand from gravel. What are the differences between the sieves used in the two instances?
Answer:

1. The holes of the sieve to separate tea leaves from tea are small.
2. The holes of the sieve to separate sand from gravel, are relatively large.

Question 15.
With what liquid do doctors mix injection powder before administering injections to patients?
Answer:

1. Before administering injections to patients, doctors mix injection powder with some liquid.
2. This liquid is water and it is known as distilled water.

Question 16.
What is a mixture? Give examples.
Answer:

1. Mixtures contain more than one substance.
2. A combination of more than one substance forms a mixture.
3. Some mixtures are natural like soil.
4. Some mixtures are man-made like laddu, lemon juice etc.

Question 17.
What is a filter paper made of? For what purpose is it useful?
Answer:

1. Filter paper is a sieve made of paper that has very fine holes.
2. We can filter very small particles using this type of sieve.

Question 18.
Can you separate mad from muddy water using a sieve?
Answer:

1. Yes. We can separate mud from muddy water using a sieve.
2. Mud water can be filtered with filter paper. The pores of the sieve (filter paper) are very small.

Question 19.
After using the Filter paper to filter water what do you find? What do you see left behind on the paper? What is obtained in the beaker?
Answer:

1. After using the filter paper to filter mud water. 1 find pure water free from mud in the filtrate.
2. Mud is left behind on the paper.
3. Pure water is obtained in the beaker.

Question 20.
How is salt manufactured?
Answer:

1. Water is generally evaporated in sunlight.
   
2. We use this property while extracting salt from seawater.
3. Seawater is captured in wide pans and is exposed to air and sunlight.
4. Then water evaporates and the salt is left behind in the pans.

Question 21.

1. Identify the part labelled X’.
2. Write a short note about it.

Answer:

1. The name of the part ’X’ is filter paper.
2. Filter paper is a sieve made of paper that has very fine holes.
3. Very small particles using this type of sieve.

Question 22.
Distinguish between the separation methods of winnowing and sieving.
Answer:

Question 23.
What is meant by solvent? Why water is called a universal solvent?
Answer:

1. A solvent is a liquid that dissolves other substances in it.
2. Water can dissolve more substances than any other solvents. So it is called Universal Solvent.

6th Class Science 5th Lesson Materials: Separating Methods 8 Mark Important Questions and Answers

Question 1.
Write at least two properties of solids, liquids and gases.
Answer:
A) Solids:

1. Solids have a definite shape.
2. Solids are incompressible.
3. Solids do not flow.

B) Liquids:

1. Liquids occupy the shape of the container.
2. Liquids are incompressible.
3. Liquids can flow.

C) Gases:

1. Gases have no fixed shape.
2. Gases can be compressible.
3. Gases flow and diffuse.

Question 2.
What is the sweet dilemma? How do you support the argument of the student Razia?
Answer:

1. Sugar takes the shape of the container. So one group of students concluded that sugar is a liquid.
2. Razia, a student, took a single crystal of sugar and one drop of water and declared that sugar is solid while water is a liquid.
3. As sugar crystals are very small they assumed the shape of the container. Razia argued that sugar crystal has a definite shape and can be held independently.
4. She showed that a drop of water has no definite shape and is not possible to hold it independently as is done with the sugar crystal.
5. This sweet dilemma is thus solved.

Question 3.
Observe the diagram and answer the following.

1. What is the aim of the experiment?
2. Write two gaseous substances.
3. Did the candle not catch fire from a distance?
4. Does the white smoke represent candle wax in the state of gas?

Answer:

1. Aim: Lighting a candle without touching its wick.
2. a) Oxygen, b) carbon dioxide
3. Yes. It catches fire, as there is vapour around the wick.
4. Yes, the smoke is the gas of wax.

Question 4.
Srikar accidentally mixed mustard seeds with rice and salt. How can he separate them?
Answer:

1. First, this mixture should be sieved through the sieve of small holes.
2. Then rice will remain in the sieve and mustered seeds along with salt will come down.
3. Now take the mixture of mustard seeds and salt in a vessel and add water to it.
4. Let the salt dissolve in the water.
5. Filter it into another vessel using a cloth or filter paper.
6. Mustered seeds will remain on the cloth/ filter paper and saltwater goes down into the vessel.
7. Heat the saltwater till the water completely get evaporate living behind the salt crystals in the vessel.
8. Thus by using three methods- sieving, filtration and crystallization, he can separate
   mustered seeds, rice and salt from their mixture.

Question 5.
Divya suggested some methods to separate mixtures given below. Are they correct? Find whether they are possible or not. Give reasons.
a) Pure water can be obtained from seawater by the process of filtration.
b) Cheese is removed from curdled milk by the process of decantation.
c) Separation of sugar from tea can be done by filtration.
Answer:
a) 1) No. Filteration is used to remove the insoluble substances only. But salt is soluble in water.
2) So, filtration is not used to obtain pure water from seawater.
b) 1) Yes. The decantation method is used to .separate an insoluble substance (cheese) in liquid (milk).
2) So, it can be removed from curdled milk.
c) 1) No. Filtration is used to remove the insoluble substances only. But sugar is soluble in tea it cannot be removed by filtration.

Question 6.
Collect information from your parents regarding various methods used by us to clean food grains at home and prepare a chart to show them.
Answer:
Methods used to clean food grains at home:

1. Handpicking: This method is used for separating small particles of dirt, stone, husk etc., from the grains of wheaL rice, pulses …. etc.
2. Sieving:
   a) Sieving is used when two components of a mixture have different particle size.
   b) Sieving allows the fine particles to pass through the holes of the sieve, while the bigger-particlesTepnain on the sieve. Eg: Sieving of wheat flour.
3. Threshing: The process that is used to separate the grain from stalks is called threshing.

Question 7.
How do you separate mud and sand from muddy water? What is sedimentation and decantation?
Answer:

1. Take a mixture of soil and. water in a glass tumbler and keep it undisturbed for some time.
2. We will find that the sand and the mud particles in the soil settle down at the bottom of the glass tumbler.
   
3. These are called sediments. This process of separation of mud and sand is called sedimentation.
4. After sedimentation, the tumbler is gently lifted.
5. The tip of the tumbler is inclined on the edge of another tumbler without disturbing the sediments. The water gets separated from the sediment (mud).
6. This process is called decantation.

Question 8.
Draw different objects made up of wood which we use in our daily life.
Answer:

Question 9.
Identify the parts labelled ‘A’ ‘B’ ‘C’ and ‘E’ in the following figure.

1. Name of the part A: ……………………..
2. Name of the part B: ……………………..
3. Name of the part C: ……………………..
4. Name of the part D: ……………………..
5. Name of the part E: ……………………..
Answer:
A: Cotton,
B: Funnel,
C: China dish,
D: Burner,
E: Stand

AP State Syllabus AP Board 6th Class Science Important Questions Chapter 4 Water

AP State Syllabus 6th Class Science Important Questions 4th Lesson Water

6th Class Science 4th Lesson Water 2 Mark Important Questions and Answers

Question 1.
Where do we get water from?
Answer:
We get water from rivers, ponds, lakes, canals and borewells.

Question 2.
For what purpose do we need water?
Answer:
We need water to perform day to day activities like cooking food, washing clothes, cleaning utensils, bathing etc.

Question 3.
Name the two processes responsible for the formation of clouds.
Answer:
Two processes are responsible for the formation of clouds.

1. Evaporation
2. Condensation

Question 4.
Write any natural disasters that are related to water.
Answer:

1. Floods
2. Tsunami
3. Drought

Question 5.
Give some examples of fruits and vegetables that contain more water.
Answer:
Vegetables: Cucumber, tomato, bottle gourd, snake gourd, etc.
Fruits: Watermelon, lemon, orange, muskmelon, mango, etc.

Question 6.
What are the main water sources in villages?
Answer:
In villages wells, canals, tanks, ponds, rivers, etc. are the main water sources.

Question 7.
What are juicy fruits ? Give examples.
A. The fruits that contains more water are called juicy fruits. Ex : Watermelon, grapes, orange, muskmelon. .

Question 8.
What are the forms of water?
Answer:
There are three forms of water in nature. They are
Ice (Solid form), Water (Liquid form) arid Water vapour (Gaseous form)

Question 9.
What is evaporation?
Answer:
The process of water changing into water vapour is called evaporation.

Question 10.
What is a cloud?
Answer:
The water vapour which enters into air through the process of evaporation forms clouds in the sky. .

Question 11.
Define condensation.
Answer:
The process of conversion of water vapour into water is called condensation.

Question 12.
When does a drought occur?
Answer:
If there is no rain for a long period, it may cause drought.

Question 13.
What are hailstones?
Answer:
Big drops of water solidify into ice and fall as pieces of ice known as hailstones.

Question 14.
What do you understand by the word ‘Precipitation’?
Answer:
The kind of weather condition where rain, snow, sleet or hail fall from the sky is called precipitation.

Question 15.
Define the Hydrological cycle.
Answer:
The circulation of water between the earth surface and air is called the Hydrological cycle or water cycle.

Question 16.
What are the main reasons that disturb the water cycle?
Answer:
Deforestation and pollution are the main reasons that disturb the water cycle.

Question 17.
What happens if there is less rainfall or too much rainfall?
Answer:
If there is less rainfall its results in droughts or water scarcity and too much rainfall results in floods.

Question 18.
Name the drought-prone districts in Andhra Pradesh.
Answer:
Ananthapur, Kadapa and Kurnool are drought-prone districts in AP.

Question 19.
Fill the blanks with suitable answers.
A → Water → B
Answer:
A. Ice,
B. water vapour

Question 20.
What is the specific measurement of volume for liquids?
Answer:
Water and other liquids are measured in litres.

6th Class Science 4th Lesson Water 4 Mark Important Questions and Answers

Question 1.
What is evaporation? What its importance in our life?
Answer:

• Evaporation is the process of water changing into water by applying heat.
• Evaporation of water helps the atmosphere to provide moisture.
• It helps in the formation of clouds.
• It cools our body from the sweat.

Question 2.
Write the situations of evaporation that we see in our daily life?
Answer:
We observe evaporation by the following situations in our daily life.

• Wet clothes drying under the sun.
• Hot tea getting cold.
• Drying of mopped floor.
• Drying of lakes and rivers
• In the preparation of salt from the sea.
• Grains and fishes dry under the sun.
• In the formation of clouds.

Question 3.
What is the importance of water in our daily life?
Answer:

• Our body needs water to maintain temperature and bodily functions.
• Water helps in digestion of food.
• Water helps to removal of toxins from the body.
• It improves skin moisture.

Question 4.
How do you appreciate the people who dicing a well?
Answer:

• Tapping of ground water by digging a well is tough job.
• The place where the well is to be dug is selected first.
• Workers using cow bars and spades begin to remove the soil at that place.
• The process of digging continues till water in the underground found.

Question 5.
How can you say that three forms of water are interchangeable?
Answer:

• Water is available naturally in three forms as ice, water and water vapour.
• When ice is heated it converts into water and if water is heated it turns into water vapour,
• Where water vapour is cooled it converts into water. If water cooled further, we will get ice.
• So, we can say that three forms of water are interchangeable.
  

Question 6.
Explain how the evaporation takes place.
Answer:

• If water is gently heated, it will become warm and vapour is produced.
• If we heat more it .starts boiling and converts completely into water vapour.
• The amount of heat absorbed by water affects its evaporation.
• If water is heated more, it will evaporate more.

Question 7.
What is the relation between rains arid clouds?
Answer:

• Clouds are formed by evaporation of water.
• When water vapour rises in the sky it forms clouds.
• The clouds are coolecl by cool breeze.
• Then the water present in the clouds condense and they become heavy and descend towards the earth as rain.

Question 8.
Why don’t all clouds cause rain?
Answer:

• The clouds moving in the air are generally at higher levels.
• The cool breeze along with the air makes the clouds cooler.
• Due to this water vapour condenses and causes rain.
• When the warmer air touches the clouds, it makes the water evaporate easily. So that that clouds cannot cause rain.

Question 9.
You might have observed a small dew-drops appeared on grass and leaves of plants. From where do these water-drops came on the leaves and grass?
Answer:

• During the winter season due to low temperature, the fog in the air settle on the grass and plants.
• Due to the transpiration process water is also evaporate through stomata. It also condensed to form fog.
• This fog condensed into tiny droplets of water which is called as dew.
• We can observe this dew only in the early hours of the day.

Question 10.
Have you observed in your daily life where water vapour changes into water? List out them.
Answer:
Yes. Here are the following situations where water vapour changes into water.

• Dew forming on grass and plants in early morning.
• Eye glasses fogging up in a cold winter day.
• Water drops forming a glass holding a cool drink or ice cream.
• Cooked food lid get water drops when the vessel cooled.

Question 11.
What changes do you notice in the sky and in the atmosphere before it rains?
Answer:

• Before the rain the sky becomes dark due to the condensation of the water or the formation of clouds.
• The atmosphere becomes very humid so that we feel so suffocated.
• The sky is covered with rainy clouds and cool wind.
• Some times thundering and sparkling may be occurring.

Question 12.
What are the types of monsoons?
Answer:
There are two types of monsoons in India.
1. South-West monsoon 2. North-East mortsoon

1. South-West monsoon: During the months of June to September clouds are moving along with the winds blowing from western direction. These winds are called SouthWest Monsoon.
2. North-East monsoon: In the months of November and December rains occur due to the movement of clouds in the direction of winds blowing from Eastern side. These winds are called North-East monsoon

Question 13.
How the rain water restores in water sources?
Answer:

• Water that comes from rainfall runs down as small streams.
• These small streams join together and make bigger streams.
• These bigger streams join the rivers.
• The rivers flow down to seas and oceans.
• Some of the rain water seeps into the ground and becomes ground water.

Question 14.
Prepare slogans on Water Conservation.
Answer:

• Water is gift from the creator. Protect it!
• Do the earth a favour- Be a saver.
• Save the water and save the life on the earth.
• Water is essence of life, save rain water.

Question 15.
What precautions do you follow to prevent the water scarcity?
Answer:

• Educate the people to change consumption of water and their life styles.
• Recycle the waste water.
• By following the water management techniques.
• Improve irrigation and agricultural practises
• By following water conservation methods such as rain water harvesting etc.

Question 16.
Which departments serve in natural disaster condition?
Answer:

• National Disaster Relief Force, State Disaster Relief Force, local fire, Health, Police and Revenue department helps the victims of natural disaster.
• Military also participate in relief activities of natural disaster.

Question 17.
What are the reasons for water scarcity?
Answer:
The main reasons for water scarcity are

• Population explosion
• Uneven distribution of rainfall
• Decline of ground water table
• Pollution of water
• Careless use of water

6th Class Science 4th Lesson Water 8 Mark Important Questions and Answers

Question 1.
Why the rainy season important for us?
Answer:

• In India, the rainy season is known as Monsoon.
• The season lasts in India for about 3-4 months.
• Indian population mainly depends on agriculture.
• So, the harvesting is largely depending on the quality of rain.
• The rainy season also significant to maintain groundwater levels.
• All the living and non-living things directly of indirectly depend upon the rainy season.
• The monsoon provides us to collect the runoff water by different methods of rainwater harvesting.
• The rains help to replenish the freshwater which is essential for life on the planet.

Question 2.
What are the main types of precipitation? Explain.
Answer:
There are four main types of precipitation. They are rain, sleet, snow and hail.

1. Rain: Water droplets fall when the air temperature is above freezing.
2. Sleet: This occurs when raindrops fall through freezing air, then they turn into pellets of ice.
3. Snow: When the water vapour passes through the very cold air, the water vapour crystallizes and forms snowflakes.
4. Hail: These forms when thunderstorm winds push water back up into the atmosphere. The water turns into ice coated with more water and pushed up to freeze again.

Question 3.
Classify the uses of water in three groups. Uses in a house or a family, for agriculture purposes and others.
Answer:

• Uses of water in a house: For drinking, bathing, washing, cleaning of vessels, toilets etc.
• For agriculture: Water is essential for germination of seeds, irrigation of crops,
• Others: Water helps to maintain our body temperature constant.
  Water is used to generate electricity.
  Water is used in many industries.

Question 4.
Write briefly about the water sources.
Answer:
Water is mainly available in three forms. 1. Ice 2. Water 3. Water vapour
1. Ice:

• It is a solid form of water. Snow occurs naturally.
• It is present in snow-covered mountains, glaciers and polar regions.
• 10% of the land area is covered with glaciers.

2. Water:

• It is a liquid form of water.
• 3/4 th of the earth surface is covered with water.
• It was present in oceans, seas, lakes, rivers and even underground.
• Seawater is salty. But water used by us in our daily purpose is not salty. It is known as freshwater.
• 3% of freshwater is available on earth.

3. Water vapour: The gaseous form of water. It was present in the atmosphere is 0.01%.

Question 5.
How the floods affect human life?
Answer:
Too much rainfall causes floods.
The immediate impacts of flooding include the following:

• Loss of human life,
• Damage to property,
• Destruction of crops,
• Loss of livestock,
• Deterioration of health conditions due to water-borne diseases,
• Destruction of power plants, roads and bridges,
• People forced to leave their own homes,
• Disruption of supply of clean water, transport, electricity, communicating etc.

Question 6.
What are the causes of the droughts? How it affects human life?
Answer:

• When a rainfall is less than normal for a long period of years for a particular region results in drought.
• Deforestation and pollution from factories lead to global warming.
• Global warming changes the atmospheric conditions which are not favourable for clouds to get cooled.
• Consequently, it leads to a decrease the rainfall.

It effects of Human life:

• It is very difficult to get food and fodder.
• Drinking water is scarce.
• People need to travel long distances to collect water.
• The soil becomes dry, agriculture and cultivation become difficult.
• Many people who depend on farming for their livelihood, migrate to other places in search of jobs.
• There is a higher incidence of heatstroke.
• Economic loss and reduced income.

Question 7.
What are the methods of water conservation? Write about water management in briefly.
Answer:
There are mainly two methods followed by us to conserve the water.
1. Water management 2. Rainwater harvesting
1. Water management: Water management consists of the following factors.
a) Bringing awareness about the bad effects of throwing wastes into the water bodies
b) Recycling of water by separating pollutants.
c) Minimizing the use of chemical fertilizers in agriculture. It reduces the pollution of underground water.
d) Controlling deforestation.
e) Adopting drip irrigation and sprinkler irrigation in agriculture. In this way, a lesser amount of water can be used for irrigation.

Question 8.
Write about the water conservation method of rainwater harvesting.
Answer:
Direct collection and use of rainwater is called rainwater harvesting There are two types of rainwater harvesting.
a) Collecting water from where it falls.
Ex: Collecting water from the rooftops of the houses or buildings (Roof water harvesting)
b) Collecting flowing rainwater.
Ex: Collecting rainwater by constructing ponds with bund.

AP State Syllabus AP Board 6th Class Science Important Questions Chapter 9 Organisms and Habitat

AP State Syllabus 6th Class Science Important Questions 9th Lesson Organisms and Habitat

6th Class Science 9th Lesson Organisms and Habitat 2 Mark Important Questions and Answers

Question 1.
What are living things and non-living things?
Answer:

• The things which possess the characters like growth movement, food, breathing, get rid of wastes, and giving birth to young ones are called living things.
• The things which do not possess these characters are called non-living things.

Question 2.
What are oviparous organisms? Give examples,
Answer:
The organisms which lay eggs are called oviparous organisms. Ex Hen, Crow. Lizard, Snake.

Question 3.
What are viviparous organisms? Give examples.
Answer:
The organisms which give birth to 3’oung ones are called viviparous organisms. Ex: – Man, Cat, Dog, Elephant.

Question 4.
What is a microscope?
Answer:
The microscope is an instrument using for observing minute organisms that we cannot see with our naked eye.

Question 5.
How do you feel when you touch the “Touch me not “plant?
Answer:

• When I touched the leaves of the ‘touch me not’ plant (mimose pudica), The leaves drooped.
• Here, touch is a stimulus to the plant, and folding of leaves are the response of the plant.

Question 6.
Do all the living things grow through out the life?
Answer:

• No all living things do not grow throughout life.
• The plants grow through out life, but the animals grow upto some age only.

Question 7.
Is a dead plant or an animal non-living things?
Answer:

• No, the dead plant, ainimals or any other living beings decompose to form non¬living constituents.
• So we can’t say dead things are non-living things.
• These are intermediate things between living and non-living things.

Question 8.
What are microorganisms?
Answer:
The living things that we can see only under the microscope are called microorganisms.

Question 9.
What is Stimulus?
Answer:
A change in the surrounding that makes an organism to respond is called stimulus.

Question 10.
In which months Pelicans are seen in Kolleru lake?
Answer:
October to March

Question 11.
What is Terrestrial habitat? Name some plants and animals of terrestrial habitat?
Answer:
The plants and animals that live in different places on the land is called Terrestrial habitat. Ex: – Mango, Guava, Sapota, Birds, Man, Snakes, Ants etc.

Question 12.
How can you say “Animals skin is a habitat for some organisms?
Answer:
We often find some insects like a leech on the skin of a buffalo. So buffalo skin is the habitat for that insect.

Question 13.
Where do usually the living organisms stay?
Answer:

• Living organisms have different needs.
• They usually stay in the places where most of their needs are met, that is they get sufficient food, shelter and other conditions necessary for life.

Question 14.
Which animals and plants do you think would like on the surface of the pond?
Answer:
The organisms like a snail, whirling beetle and pond skaters live on the surface of water.

Question 15.
Can different places in the pond also be called habitat? Why? or why not?
Answer:
Yes, different places in the pond can also be called habitat. Why because. Ex : Plant. The plant in a pond habitat provide food oxygen and shelter for the animals. There are different places where plants and animals live. A pond is a habitat too.

Question 16.
Name the different organisms that you find on the tree?
Answer:
Birds, Monkeys, Squirrels, Snakes, Ants, Spiders, Caterpillars, Moths, Bees, Wasps, Small plants (mosses), mosquitoes are some organisms that I find on a tree.

Question 17.
Why do only certain types of animals and plants live along with us?
Answer:

• Because these plants and animals serve us.
• These plants and animals are sure of their shelter, and food.
• We domesticate some types of animals and plants for our needs such as food.

Question 18.
Are all plants that grow in an orchard the same as the plants in a forest? Why is it so?
Answer:

• In an orchard, only fruit plants are grown.
• Tamarind, mango, amla are examples of plants that grow in forests.

Question 19.
Give examples for desert plants?
Answer:
Cactus, Optunia, Aloevera.

Question 20.
Which animals and plants do you think would live in midwater?
Answer:
Great water boatman, Leech, Mosquito larvae, Fish and Crabs.

6th Class Science 9th Lesson Organisms and Habitat 4 Mark Important Questions and Answers

Question 1.
Which characteristics are same in the both living and non-living things?
Answer:

• All living and non-living things are made up of matter.
• All living and non-living things have mass and occupy space.
• Both are made up of structural units.
• Molecule is the structural unit of living and non-living things of the cell.

Question 2.
Do you think both living and non-living things are necessary for our environment, why?
Answer:

• Yes, both living and non-living things are necessary for our environment.
• For example, a plant is a living thing. It takes water and minerals from the soil for its survival.
• It means living things depend upon non-living things. This keeps our environment, well.

Question 3.
Vamsi argues with his friend Ramu about seed is living one. Think what questions does Ramu ask?
Answer:

• Is seed growing?
• Is there movement in a seed?
• Does the seed take food?
• Can the seed breathe?
• How can the seed get rid of wastes in it?

Question 4.
Write down the steps of the experiment that you did in the lab to observe micro-organisms in pond water, well and borewell?
Answer:

• Collect water samples from a pond, well, and bore well.
• Keep them separately.
• Put a water drop on a slide keep a coverslip on it.
• Observe under a microscope.
• We can see different types of micro-organisms in the above three.

Question 5.
What are the different habitats around us?
Answer:

• We find animals living on trees, in our houses, in different areas in the pond, in a small pool of water after rains and in several other places.
• As the area increases, the type and number of organisms living there usually increase.
• You would find more type of organisms living in your house than your hair, and more in the pond than your house, more in the lake than your pond and so on.
• These larger areas are suitable for supporting the life of more organisms.

Question 6.
What are aquatic plants, aquatic animals and aquatic habitat?
Answer:

• In all ponds we can see both plants and animals.
• The plants that we see in water are called aquatic plants.
• Animals are called aquatic animals.

Question 7.
Our house is also a habitat comment on this?
Answer:

• We can say that our house is also a habitat.
• Several animals like dogs, cats, goats, cows, birds, spiders, ants and cockroaches live with us.
• Plants like the money plant and some crotons are also kept inside our houses.

Question 8.
Write a note on desert plants?
Answer:

• Cactus, acacia, aloe vera, plants do not need water.
• They are called desert plants. We can see camels frequently in the desert.
• Desert plants and animals are suited to dry conditions and vast temperature differences.

Question 9.
Rajesh does not want to disturb squirrels that eat fruits on the guava tree at his house. Why does he do so?
Answer:

• The animals take food whenever they get it.
• If they are disturbed during their eating, they get annoyed and may behave with perversion.
• Rajesh does not like to interfere with the nature as its adverse effects reflects on our quality of life.

Question 10.
Why should we take responsibility towards our pet animals?
Answer:

• We should take care of our pet animals. Ex : Dog, Parrots, Cow, etc.
• Keeping their sheds clean, supplying fodder and water to them is our responsibility.
• If we show concern for animals they become affectionate to us.
• You notice your pet dog licks your feet, wags its tail, sits near you and walks with you.

6th Class Science 9th Lesson Organisms and Habitat 8 Mark Important Questions and Answers

Question 1.
Describe the structure of the microscope.
Answer:

• The microscope is an instrument with the help of which we are able to see minute things that we cannot see with our eyes.
• It works like a hand or magnifying lens but it is much more powerful.
• Basically, there are two components in a microscope the structural component and a visual component.
• The structural component are the head/body base and arm.
• Visual components are eyepiece, objective, nose piece coarse and fine adjustment knobs, stage, aperture etc.

Question 2.
What happens if a habitat is disturbed or destroyed?
Answer:
Habitat is a place where many kinds of species that are diversified in nature stays together. When a habitat is being destroyed or destructed due to the less availability of food and other resources they either die or shift to some place else. This results in the instability of the balance in ecosystem.

Question 3.
Why birds are migrating from one place to other place?
Answer:

• Different kinds of birds come from long distances to Kolleru and Pulicat lakes of our state.
• During the months of October to March, Pelican birds appear on those lakes.
• Generally we can see birds flying over long distances to find suitable conditions for reproduction.
• Animals like turtles move away from coasts of West Bengal and Odisha to the coasts of Vishakhapatnam.
• Some fishes like Pulasa migrate from sea water to river water.

Question 4.
Write a note on organisms in water?
Answer:

• Collect water samples from a pond well, bore well and keep them separately.
• Put a drop of water in a slide. Keep another slide on it.
  
• Observe under microscope.
• All water samples do not have the same type of microorganisms.
• There is no water without microorganisms.
• We find difference in the appearance of microorganisms in pond water and bore well water.

Question 5.
Observe the figure and answer the following questions.

a) Does the seed take in food?
b) Is it possible to store the seed for long time?
c) What happens when a seed is shown in soil?
d) How can say that seed is a living thing?
Answer:
a) No. The seed doesn’t take in food. Seed itself carry the food that helps the new plant begin to grow.
b) Yes if we preserve it carefully we can store the food for a long time.
c) It starts to germinate.
d) Seeds germinate and turn into a whole plant. So we can say that seed is a living thing.

Question 6.
What happens if we encroach the habitat of animals?
Answer:
If we encroach the habitat of animals, they may fall in danger.

• Animals are partners of our Habitat.
• They also have a right to live.
• We people are encroaching their habitats.
• If we cut a tree, birds that live on it lose their nests and fall in danger.
• We often see dogs, cows, monkeys suffering from lack of food and shelter.
• There are some voluntary organizations that work for animal rights and protection.
• We have to provide food and protect them, it is our responsibility.

Question 7.
Name some organisms in the pond that can stay in different regions in the same pound. What makes them stay in different regions in pond?
Answer:
The surface of pond:

• Dragonfly, mayfly, snail, kingfisher whirling beetle and pond skater, etc. are found on the surface of the pond.
• However there is plenty of food and air and this is why fish usually come to the surface for feed.

Mid water:

• In mid-water great water boatman, leech and mosquito, larvae fish, and crab are found.

Pond margins:

• In the pond margins animals like frogs, cranes, crabs are found.
• Fish usually lay eggs here.

Bottom of the pond:

• At the bottom plants like hydrilla, and animals like mussels and flatworms live here. Because of their habitat and adaptation, the organisms’ make them to stay at different regions in the pond.
• Light is minimum here but food in the form of dead and decaying matter is in plenty.

AP State Syllabus AP Board 6th Class Science Important Questions Chapter 3 Animals and their Food

AP State Syllabus 6th Class Science Important Questions 3rd Lesson Animals and their Food

6th Class Science 3rd Lesson Animals and their Food 2 Mark Important Questions and Answers

Question 1.
Define herbivores.
Answer:
The animals which feed on only plants and plant products is called herbivores.

Question 2.
Define carnivores.
Answer:
The animals that feed on only animals are called carnivores.

Question 3.
Define omnivores.
Answer:
The animals that feed on both plants and animals are known as omnivores.

Question 4.
What are frugivorous animals?
Answer:
The animals feed mostly on raw fruits, succulent fruits like vegetables, roots,, shoots, nuts and seeds are called frugivorous animals.

Question 5.
In which animals are common in frugivorous animals?
Answer:
Mammalian herbivores are frugivorous animals commonly.

Question 6.
What are the senses used by animals to track food?
Answer:
Animals use a wide range of senses to track food such as – smell, sight, hearing, taste and touch.

Question 7.
Which parts in the animal’s body are used to collect the food?
Answer:
Many animals use the parts in their body such as mouth,- hands, or feet-, teeth, claws, and tongue to collect the food.

Question 8.
Give examples of animals that use the visionary sense to find its food.
Answer:
Vulture and eagle use their visionary sense to find their food.

Question 9.
Give examples of animals use the sense of touch to find their food.
Answer:
Spiders and pond skaters use the sense of touch to find their food.

Question 10.
What are pond skaters?
Answer:
Pond skaters are the insects that lives on the surface of the pond and feed op other insects at the pond.

Question 11.
Name some animals which use the tongue as a tool for taking food.
Answer:
Frog, lizard, dog, chameleon, echidna etc.

Question 12.
Which part helps the leech to lake food in?
Answer:
Suckers in the mouth help the leech to take food in.

Question 13.
Name the birds which have strongly hooked beak, and long beak?
Answer:
Strongly hooked beak – Vulture.
Long beek- Crane.

Question 14.
How the hummingbird takes its food?
Answer:
Hummingbird sucks nectar from the flowers with its long thin beak.

Question 15.
What is the similarity do you find in the duck teeth and fish teeth?
Answer:
Duck teeth and fish teeth act as filters to get food from the water.

Question 16.
Which parts of a cow’s mouth involved in eating its food?
Answer:
Jaws, teeth, and tongue are involved in eating its food.

Question 17.
Give examples for natural scavengers.
Answer:
Crows, Vultures are examples for natural scavengers.

Question 18.
Which parts help the wild animals for hunting?
Answer:
Wild animals like tiger and lion has strong legs to run, sharp claws to catch and sharp teeth to tear flesh.

Question 19.
Which animals have a similar mechanism as frogs to get in food?
Answer:
Lizard and chameleon have a similar mechanism to get their food.
These animals use their tongue as a tool to pick its food.

Question 20.
What is a food chain?
Answer:
The feeding relationship between different organisms in a particular habitat is called food chain.

Question 21.
Define food web.
Answer:
A food web is the natural interconnection of food Chains in a particular habitat.

Question 22.
How can you say that ants are good farmers also?
Answer:

• The ants cut leaves into pieces and create a bed to grow a type of fungus which they eat.
• As they cultivate a fungus, they are said be good farmers also.

Question 23.
What are producers? Give examples.
Answer:
Producers are organisms that make their own food. Ex: All plants.

Question 24.
What is a primary consumer? Give examples.
Answer:
A primary consumer is an organism that feeds on producers for their energy. Ex: Deer, Cow, Goat.

Question 25.
What is a secondary consumer? Give examples.
Answer:
A secondary consumer is an organism that feeds on the primary consumer for energy. Ex: Hen, Wolf, Fox, Fish

Question 26.
What is a tertiary consumer? Give examples.
Answer:
A tertiary consumer is an organism that feeds on a secondary consumer. Ex: Tiger, Lion.

Question 27.
What are decomposers? Give examples.
Answer:
Decomposers are an organism that breakdown dead or decaying organisms. Ex: Bacteria, Fungi.

6th Class Science 3rd Lesson Animals and their Food 4 Mark Important Questions and Answers

Question 1.
How can you say that animals use some senses more strongly than the others?
Answer:

• Animals use different senses to find out their food.
• They are – smell, touch, hearing, sight and taste.
• For example, dogs use the sense of smell, while vulture use vision.
• Bats depends on hearing, while some reptiles on taste.

Question 2.
How the pond skaters found their food?
Answer:

• Pond skaters are insectivorous as they eat insects.
• Pond skaters detect ripples produced in water by other insects.
• They compare the ripples on the opposite sides of the pond caused by the legs of the insect struggling to move out.
• Pond skater calculate the distance and set out to grab it.

Question 3.
“The same part may be used in different ways by different animals. How can you support this?
Answer:

• The same part of animals used by different ways by different animals.
• Ex: Tongue used by dog in a different manner as compared to frog.
• The dog licks with its tongue while the frog captures and swallows it.

Question 4.
“Different parts may be used to take in the same type of food. ” How can you agree with this statement?
Answer:

• The same type of food is taken by different animals by using their different body parts.
• Ex: Insects are the food for hen and frog, but the body parts are different to take in.
  Hens use their beak to pick insects, while frogs use their tongue to grab the insect into the mouth.

Question 5.
How leeches get their food?
Answer:

• We will find leeches near water.
• Leeches stick on to the skin and suck the blood of cattle as well as humans.
• They have special structures called suckers in their mouth.
• With the help of sucker, the suck the blood from the animal.

Question 6.
How is the shape of bird’s beak related to what it eats?
Answer:

• The beaks are different because the birds eat different kind of food.
• The shape of bird’s beak is designed for eating a particular type of food such as seeds, fruits, insects, nectar, fishes and other small animals.

Question 7.
What is the speciality duck beak than other birds?
Answer:

• Ducks are mostly aquatic birds.
• Ducks have teeth, but they are not like the teeth of a cow or lion.
• They are not useful in grinding food.
• They act as filters: to get food from water.

Question 8.
How do animals eat?
Answer:

• Plants and animals are the main sources of food in our surroundings.
• Every animal has its own style of getting food.
• They track down, collect, grab or hunt to get their food.
• They use the various parts of the body to take food into the mouth finally.

Question 9.
How does a frog get its food?
Answer:

• Frog eat bugs, spiders, larvae and small fish etc.
• The frog throws out its sticky tongue towards the art insect.
• The insect gets stuck on the frog’s tongue.
• Then the frog swallows it.

Question 10.
How does a cow get its food?
Answer:

• Cow depend on plants for food, so it is an herbivore.
• Cows chew the food quickly and swallows and store it in a part of their stomach.
• After sometime, they take food material back from the stomach to the mouth and chew it again.
• This process is called rumination. In this process jaws, tongue, teeth are involved.

Question 11.
Write about rumination?
Answer:

• Rumination is a process in which the animals bring the previously consumed food into the mouth once again and chew it.
• It is also defined as the action of chewing.
• This process is commonly seen in the animals such as cattle, sheep, goat, deer, camel, buffalo, giraffes.
• Jaws, tongue, teeth are involved in this process.

Question 12.
How a dog gets its food?
Answer:

• Dog is an omnivorous animal.
• It senses the food with smell.
• Mouth, teeth, tongue, legs, nails are involved in taking the food.
• The dog licks water with its tongue and drink it.

Question 13.
Distinguish the difference between food chain and food web.
Answer:

Question 14.
What is the importance of decomposers in a food chain?
Answer:

• Bacteria and fungi are decomposers.
• Decomposers break down dead plants and animals.
• They return the nutrients into the soil for other organisms to use.
• They help in the cycling of materials between producers, consumers, and soil.

Question 15.
What are the similarities and differences found in the birds’ duck and crane?
Answer:

• Duck and crane both are aquatic birds.
• Duck and crane use their beaks to catch the fish.
• The crane has a long beak to catch the fish in the water.
• The duck beak is broad and flat and has teeth. The teeth act as filters to get food from the water.

Question 16.
How the beak of a crow differs from the beak of a parrot?
Answer:

• Parrot and crow both are omnivorous animals that eat both plants and animals.
• The parrot has a hooked bill to eat fruits and crack the nuts.
• It is also used for climbing as well as manipulating and crushing objects.
• The crow has a large strong beak to eat fruits, seeds, insects, fishes, and other small animals.

Question 17.
What are natural scavengers? What it’s importance in nature?
Answer:

• Scavengers are the organisms that feed on the dead and decaying matter.
• these help the environment to be clean by eating out all the waste matter.
• They keep our surroundings clean in this manner.
• Ex: Crows, vultures, and some insects.

Question 18.
What is the difference between producers and consumers?
Answer:

Question 19.
Draw a neat diagram of the beaks of a parrot and eagle.
Answer:

Question 20.
Draw a neat diagram of the beaks of duck and sparrow.
Answer:

Question 21.
Draw a schematic diagram showing the energy flow in a food chain.
Answer:

6th Class Science 3rd Lesson Animals and their Food 8 Mark Important Questions and Answers

Question 1.
Write any four birds and their food habits and their beak types in a tabular form.
Answer:

Question 2.
Collect the information from the library or internet about the examples of animals and what their colonies are called?
Answer:
Group of birds – Folk
Honey bees colony – Beehive
Group of grasshopper – Locust
Group of camels – Caravan
Elephant colony – A parade
Leopard colony – A leap
Tiger colony – Ambush
Kangaroo colony – Mob
Lions colony – A pride
Owls colony – A parliament

Question 3.
Write a note on the wonderful world of ants.
Answer:

• Ants are social insects, which means they lice in a group or colony by sharing works.
• Ant colonies are highly organized, usually ruled by a single queen ant.
• In a colony the ants are categorized as workers, soldiers, female and male ants.
• The workers collect and maintain food stock for others in the colony along with several other duties.
• Ants kept a type of insect called aphid for honeydew.
• Ants are good farmers as well.
• They cut leaves into pieces and create a bed to grow a type of fungus that they eat.

Question 4.
What are the levels of the food chain? Describe.
Answer:
There are four levels in a food chain. They are:

1. Producers: The first level of the food chain. They make their own food and provide food to all other organisms.
2. Primary consumers: This is the second level of the food chain. They depend on producers for food. They include herbivores such as insects, rabbits, cows etc.
3. Secondary consumers: This is the third level of the food chain. They depend on primary consumers for their food. They include carnivores such as birds, frogs, fox, etc.
4. Tertiary consumers: The fourth or top level of the food chain. They depend on secondary consumers for their food. They include carnivores that feed on other carnivores. Ex: Lion, Eagle, Tiger, etc.

Question 5.
Draw the diagrams of different beaks of birds.
Answer:

AP State Syllabus AP Board 6th Class Science Solutions Chapter 3 Animals and their Food Textbook Questions and Answers.

AP State Syllabus 6th Class Science Solutions 3rd Lesson Animals and their Food

6th Class Science 3rd Lesson Animals and their Food Textbook Questions and Answers

Improve Your Learning

Fill in the Blanks.

1. The butterfly uses ——– to suck honey from flowers.
Answer:
Proboscis.
2. Tiger is a ——– because it eats only meat.
Answer:
carnivore.
3. Decomposers are also called ——–
Answer:
Recyclers.

Choose the correct answer.

1. The source of energy for a food chain is
A) Producers
B) Consumers
C) Sun
D) Decomposers
Answer:
C) Sun

2. Identify the omnivore from the following.
A) Lion
B) Cow
C) Dog
D) Tiger
Answer:
C) Dog

3. At which position of the food chain would you place a human being
A) Primary consumer
B) Secondary consumer
C) Tertiary consumer
D) All the above
Answer:
C) Tertiary consumer

Answer the Following Questions.

1. List some animals in your surroundings which have the same kind of food habit.
Answer:

• Cow, buffalo, goat and sheep have some kind of food habit as an herbivore depend upon the plants for food.
• Dog and cat depend upon meat, milk and curd.

2. Compare the legs and nails of a dog and hen and say why they are different?
Answer:

3. Name some animals which use tongue as a tool for taking in food.
Answer:
Frogs, lizards, garden lizard, chameleon, echidna use tongue as a tool for taking in food.

4. Identify which of the following statements are wrong and give reasons.
(a) All the animals living in water feed only on plants.
(b) Elephants and deer are herbivores living in the forest.
(c) Birds’ beaks are designed to suit their food habits.
(d) Sharp claws are useful for hunting.
(e) Most of the food chains end with herbivores.
Answer:
a) All the animals living in water feed only on plants.

• This statement is wrong. There are many animals living in water which eat animals.
  Ex: A blue whale in the sea eats tiny animals called krill.

b) Elephants and deer are herbivores living in the forest.

• This statement is correct as elephants and deer are herbivores living in the forest.

c) Bird’s beaks are designed to their food habits.

• This statement is correct as bird’s beaks are designed to their food habits.

d) Sharp claws are useful for hunting.

• This statement is correct.
• Sharp claws of some animals meant for tearing the flesh of prey. And also help to increase traction to run faster as in the case of cheetah.
• In some animals claws help holding the grip for running while hunting.
• In the hen the claws are helpful to scratch the soil to find worms.

e) Most of the food chains end with herbivores.

• This statement is wrong.
• The food chain starts with herbivores and ends with carnivores which are wild.

5. Write the importance of the food chain.
Answer:

• The food chain shows how energy is transferred from one living organism to another organism.
• It describes energy and nutrients move through an ecosystem.
•  It shows the relationship between producers and consumers.
• It explains the interdependence of diverse organisms in nature.

6. Arrange the following in a correct sequence and form a food chain
1. Rabbit → Carrot → Eagle → Snake
2. Human → Insect → Algae → Fish
Answer:
1. Carrot → Rabbit → Snake → Eagle
2. Algae → Insect → Fish → Human

7. If you want to understand more about food chain what questions would you like to ask?
Answer:

• What is food chain?
• How does animals and plants dependent on one another?
• How does energy flow with in an ecosystem?
• Is there any relation of food habits of animals with that of living ecosystem?
• How the nature balances the ecosystem?
• Why the food chain always starts with plants?

8. What happens if there are no decomposers on the earth?
Answer:

• Bacteria and fungi are get energy by breakdown of dead plants and animals. So, they are called decomposers.
• They help in the cycling of materials in the environment.
• If there were no decomposers the dead and waste materials remains on earth.
• The nutrients would not be replenished.
• Natural enrichment of the soil cannot takes place.
• Because of the dead organisms remain on earth, the existence of life on earth would have been impossible.

9. Draw a food chain of your choice.
Answer:

10. How can you appreciate the role of producers in a food chain?
Answer:

• Plants are known as producers, as they make their own food.
• Plants are the only organisms which provide food for all organisms in an ecosystem.
• In an ecosystem, Producers are at base of entire food chain.
• Plants not only provide the food but also oxygen to the earth.
• Plants are the precious things to continue the life on earth.

Activities and Projects

Question 1.
Go to a nearby pond where cranes are usually seen. Observe how they catch fish. Write about the process of catching fish. (Take care of yourself when you are near water places.)
Answer:

• The crane usually has been seen in lakes and the fishes are food for that.
• The long thin legs that it has helps it to move in the water without disturbing the water.
• While catching the fish it tries to move very slowly.
• So that the fishes don’t know its presence it also can stand still for a long time for hunting of fishes.
• Crane used to catch the fish with the help of their long beak.

Question 2.
Collect one or two earthworms and put them in a bottle containing wet soil. Close it with a lid that has holes. Observe how earthworms get their food. Record your observations.
Answer:
Aim: To observe the eating activity of earthworms in the wet soil.
What we want: Two earthworms, one glass bottle, wet soil.
What to do: Take a glass bottle and fill it with some wet soil.

• Now kept the two earthworms in the soil filled bottle.
• Observe them for sometime.

What do we see: We observed that the earthworms are started swallowing soil in, little quantities.
What we learned: With the above observations we concluded that the earthworms are feed on moist soil which contains nutrients.

Question 3.
Fill up the following table

Answer:

Question 4.
Make your own food chain and display it in your classroom.
Answer:
Plant → Caterpillar → Chameleon → Snake → Mangoose
(This food chain can make with diagrams of those animals) (Student Activity)

Question 5.
Prepare a scrapbook of animals and separate them into carnivores, omnivores and herbivores.
Answer:
Students can collect the pictures of different animals and after dividing them into carnivores, omnivores and herbivores they can be pasted under these heads separately in the scrapbook. (Student Activity)

6th Class Science 3rd Lesson Animals and their Food Activities

Activity – 1

Some animals are listed in the given Table -1. For some the animals, the type of food they eat is also given. Fill the blanks in Table.

Answer:

Answer the following questions based on the table.
i) List the animals that depend only on plants and their products for food.
Answer:
Buffalo, cow, butterfly.

ii) List the animals that depend only on animals and their products for food.
Answer:
Cat, lion, tiger, house lizard, spider.

iii) List the animals that depend on both plants and animals for food.
Answer:
Rat, cow, crow and human beings.

Activity – 2

2. Write the parts of the body animals that are used to collect or capture food in the given table.

Answer:

Answer the following questions based on the above table.
i) Do all the animals use similar parts in taking in food?
Answer:

• No. All animals do not use similar parts in taking in food.
• Ex: Cow and lizard uses mouth and tongue, whereas hen and humming bird uses beak taking in food.

ii) Name some animals which use similar parts in taking in food?
Answer:
The animals that use some parts for taking food are

1. Hen, humming bird, vulture use their beak to get food.
2. Cat and dog – use their sharp teeth to tear the food in pieces.
3. Lizard and frog – use their tdngue to capture the food.
4. Lion and tiger – uses their strong legs to run for chasing the animal, sharp claws to catch and sharp teeth to tear flesh.

iii) Compare the parts of dog to that of frog. Note down the similarities as well as differences observed by you.
Answer:
Dog uses smell sense to trick the food whereas frog have a smell organ in the roof of their mouth called the jacobsons organ. This detects food.

• Dog and frog both use the tongue in taking food.
• The dog uses its teeth and nails in capturing the food, while frog uses its sticky tongue to capture the food and swallows it.

iv) Compare the parts of hen and sparrow in eating food. Note down the similarities as well as differences you observed.
Answer:
Similarites:

• Hen and sparrow use their beaks to take the food in.
• Both are finding out their food by using the vision, as a sense.
• Hen and sparrow both feeds on grains, worms and insects.

Difference:

• Hen uses its claws to scratch the soil to find out worms whereas sparrows feed on the insects / worms which are present on plants.

v) What are the similarities between a dog and a lion in the parts involved in taking in food?
Answer:

• The dog licks with its tongue and runs fast.
• The lion hunts the other animals. It uses strong legs to run sharp claws to catch and sharp teeth to tear the flesh.
• The claws of the lion are also sharp to hold the animal.
• Dog also uses its teeth and nails in capturing its food.

vi) What are the similarities and differences between a vulture and a lion in their mode of taking in food?
Answer:

• Both lion and vulture are carnivores.
• They both have sharp vision and use their sharp claws to tear the flesh.
• Lion hunts animals staying on land.
• Vulture hunts its food by flying high in the sky.

Activity – 3

3. Look at the picture. Different birds have different beaks. Do you know why they are different?

Answer:
The beaks are different because the birds eat different kinds of food.

• So, the type of beaks depends upon their habitat, environment and food habits also.
• The beaks of birds are help to them to kill the prey, to fight, to get food and feeding their young ones. Based on their food habit the birds have different types of beaks such as strong hooked beak, hooked beak, long beak, long thin beak etc.

Activity – 4

4. i) Observe how a lizard catches its food. Write down your observations.
Answer:

• Lizard uses its visionary sense to track the food.
• Lizard concentrates its attention on the movements of the insect.
• Lizard moves so fast towards the insect.
• It catches the insect by using tongue and eats it.

ii) Find out the differences between a frog and a lizard’s way of taking in food.
Answer:

iii) How do these animals (Frog, lizard) use their tongue?
Answer:
These animals (Frog, lizard) use their tongue to capture the food.

Activity – 5

5. Observe a cow/buffalo while eating its food. Write your observations in your notebook by following the given questions.

i) How does a cow find its food?
Answer:
Cow finds its food by using the sense of smell.

ii) Note the parts of the body involved in it?
Answer:
Mouth and tongue are involved to take the food in.

iii) What mouthparts of the cow are involved in eating its food?
Answer:

• The cow uses its tongue to grasp a clump of grass.
• Teeth help to shred the grass into small pieces.

iv) Do cows have teeth? Do they have teeth on both jaws?
Answer:
Yes. Cows have teeth on both jaws. But don’t have top front teeth.

v) In what way can you justify it is herbivore?
Answer:

• Cow depends only on plant and plant products for food.
• They eat different parts of plants like green/dry grass, leaves, branches arid fruits.
• So that, we can say cow is herbivore.

vi) You may have observed cows and buffaloes sitting under the trees and moving their jaws. Do you know why they do that?
Answer:

• Cow and buffalo chew food very quickly, swallow and store it in a part of their stomach.
• After some time, they back the food material from the stomach to the mouth and chew it again leisurely.

Activity – 6

6. Observe a dog in your surroundings. How does it get its food? Write your observations by following the given questions.

i) What does it do to find food?
Answer:
The dog finds its food by smelling. Dog’s nose is a thousand times more sensitive than ours.

ii) Which parts are involved in taking in food?
Answer:
The mouth and tongue are involved in taking in food.

iii) How does a dog eat meat?
Answer:

• The dog catches another animal with its legs.
• It tears the meat using its sharp teeth.
• It eats the meat and chews it with the help of teeth and uses its tongue to swallow it.

iv) How does a dog drink water?
Answer:
The dog licks water with its tongue and drinks it.

v) Is there any difference in using its tongue when compared with a frog or a cow? Write in the space provided below.

Answer:

Activity – 7

7. Observe the picture and answer the following questions.

i) What is the source of energy in a food chain?
Answer:
Sunlight is the source of energy in a food chain.

ii) How does grasshopper get its energy?
Answer:

• In a food chain grasshopper is a primary consumer so that it depends on grass for food.
• Then grasshopper gets its energy by eating grass.

iii) What happens to the crow if the frog was removed from this food chain?
Answer:

• In this food chain frog is a secondary consumer as its feed on grasshopper.
• If the frog was removed in this food chain, the grasshopper population will be increased.
• In this food chain crow is a tertiary consumer as its feed on frogs.
• If the frog was removed from this food chain, the crows will go hungry and their population will be decreased.

iv) What is the role of mushrooms in the given picture?
Answer:

• Mushroom is a decomposer.
• Mushroom get it energy by the breakdown of dead matter.
• It helps in the cycling of materials in between producers, consumers and to the soil.

AP State Syllabus AP Board 6th Class Science Solutions Chapter 6 Fun with Magnets Textbook Questions and Answers.

AP State Syllabus 6th Class Science Solutions 6th Lesson Fun with Magnets

6th Class Science 6th Lesson Fun with Magnets Textbook Questions and Answers

Improve Your Learning

Fill in the Blanks.

1. The materials which are attracted towards a magnet are called ——–.
Answer:
Magnetic material.
2. Paper is not a ——– material.
Answer:
magnetic
3. In the olden days, sailors used to find direction by suspending a piece of ——–.
Answer:
natural magnet with thread.
4. A magnet always has ——– poles.
Answer:
two

Choose the correct answer.

1. Which of the following object is attracted by magnet?
A) wooden piece
B) plain pins
C) eraser
D) a piece of paper
Answer:
B) plain pins

2. A freely suspended magnet always comes to rest in the direction
A) North – East
B) South – West
C) East-West
D) North-South
Answer:
D) North-South

3. Magnets lose their properties when they are
A) used
B) stored
C) heated
D) cleaned
Answer:
C) heated

Answer the Following Questions.

Question 1.
List the magnetic and non-magnetic materials in your classroom.
Answer:

Question 2.
If you have two similar bars, one a magnet and another a piece of iron. Can you find out which one of these is a magnet? Explain the process.
Answer:

1. We will take a bar magnet. We have to identify two identical bars A and B. One as a magnet and the other as a simple bar.
2. To identify, we have to bring our magnet to both the ends of bars A and B one after another.
3. It is easy to locate the magnet. It attracts the bar magnet when pointed to its one end and repels if pointed to the other end.
4. The iron bar will be attracted by the magnet in both situations.

Question 3.
The teacher said that the Earth is a magnet. But Sreevidya has some doubts and she asked her teacher some questions. What may be the questions?
Answer:

1. Is there any big magnet present inside the Earth?
2. Who has put that magnet inside the Earth?
3. Where are the South and North poles of Earth’s magnet?
4. How is this magnet inside the earth discovered?
5. Is the magnet inside the earth there from the time of formation of the earth?
   Such questions are likely to be asked by Sreevidya.

Question 4.
Does the Earth behave as a magnet? How do you prove it?
Answer:

1. A bar magnet is placed on the table.
2. Another bar magnet is suspended very close to the first one kept on the table.
3. It is observed that the N – pole of the suspended bar magnet points towards the S – pole of the magnet placed on the table.
   
4. The S – pole of the suspended bar magnet points towards the N – pole of the bar magnet kept on the table.
5. Later the first bar magnet is removed from the table.
6. Now the suspended bar magnet aligns itself in the North-South directions of the earth.
7. This is because the earth influenced the Suspended bar magnet as the first magnet done.
8. With this, it is evident that the earth behaves as a magnet.

Question 5.
Predict which of the following materials are magnetic and non-magnetic. Test with a bar magnet and check your predictions. What do you say after testing all materials? Plastic, Iron, Stainless steel, Wood, Aluminum, Gold, Silver, Copper, Paper, Cloth.
Answer:
My predictions and tests are recorded in the table given below.

Question 6.
Draw a bar magnet and locate the poles.
Answer:

Question 7.
Surya was wonderstruck to know that Earth is a big magnet and appreciated the efforts of scientists to discover this. Do you notice any such things in magnets to appreciate? Explain.
Answer:
I found the following things in magnets to appreciate.

1. Every magnet has two poles. If we break a magnet into two pieces, each piece develops two poles and act as individual magnets.
2. A freely suspended magnet always rests in the north-south direction. This helps in identifying the directions in new places.
3. Iron nail kept near magnet act as magnet due to magnetic induction.
4. Magnetic levitation helps to run electro-magnetic trains.
5. The attraction property of magnets helps in the separation of magnetic materials from their mixtures.
6. Electrical cranes are used to lift the huge weight of magnetic materials using this attraction property.
7. Magnets are useful in various equipment such as motors, speakers, etc.

Question 8.
Mention some situations where you use magnets in your day-to-day life?
Answer:
A magnet finds its use at a number of places.

In addition, magnets are used in audio and videotapes and computer hard disks to store information. Magnets are also used for magnetotherapy.

Activities and Projects

6th Class Science Textbook Page No. 69

Question 1.
Think and say, in which directions your house is facing? Use the compass and find out the exact direction of your house and compare it with your prediction. Similarly predict and find out in which direction you keep your head while sleeping at night, the directions you face while you are reading, eating etc.
Answer:

1. I felt my house is facing towards east.
2. By using compass I found that it is very slightly towards north east.
3. I predicted that I keep my head towards east while sleeping but found it is also very slightly towards north east.
4. I predicted that I face towards east while reading and eating also. But I found it also same as above.

Question 2.
Prepare a toy using magnets and write the procedure of preparation briefly.
Answer:

1. Secure a plastic toy car. Fix a small bar magnet in it by using tape.
2. Now, keep the car on a table and hold it in your hand.
3. Keep the N-pole of the magnet facing the S-pole of the magnet in the toy car.
4. The car moves forward as your gradually draw the magnet in your hand backwards. (∵ unlike poles of magnets attract each other)

Question 3.
Think and say where the poles will be located in a ring magnet? Try to find out its poles using a bar magnet and check your prediction.
Answer:
Prediction: Magnetic poles are located on the upper and lower surfaces of a ring magnet.
Check:

1. When I bring south pole of a bar magnet near the upper surface of the ring magnet they repel each other indicating that the upper surface of the ring magnet is its south pole.
2. When I bring south pole of a bar magnet near the lower surface of the ring magnet they attract each other indicating that the lower surface of the ring magnet is its north pole.
3. But I came to know from my teacher that there are three possibilities of having poles position basing on their mode of preparation.
   i) Upper & lower surfaces( Axial)
   
   ii) Parallel to the Height ( side by side )( Diametral)
   
   iii) Inner and outer surfaces. (Radial)
   

Question 4.
Magnetize a needle using a bar magnet. Make a compass with that needle by following the process explained in activity.
Answer:

1. Take a bar magnet and place one of its poles near to sharp edge of needle.
2. Move the bar magnet along the length of the needle till we reach the other end.
3. Then the bar magnet is lifted from the other end and brought to the same pole of the bar magnet.
4. On repeating the process for at least 20 to 30 times the needle will became magnetized.
   
5. Tape the magnetized needle to a light cork.
6. Float the cork in a glass of soap water as shown in fig.
7. The needle points in North-South direction. Thus it acts as a magnetic compass.

Question 5.
Kiran wants to prepare a toy using some magnets to make people understand the slogan “Reject bad food and accept only good food”. Can you help him to prepare the toy? If yes, how?
Answer:

1. The toy can be prepared like this.
2. Take a plate. Put good food on one side and bad food on the opposite side in the plate and label accordingly.
3. A magnet is attached at the bottom of this plate with its N-pole pointing towards good food and S-pole pointing towards bad food.
4. A magnet is fitted in the bottom of a duck where its S-pole points towards the mouth and N-pole points towards the tail of the duck.
5. When good food portion of the plate is brought closer to the duck, the duck placed in a tub of water moves towards the plate because unlike poles of the magnets attract each other.
6. When the bad food portion of the plate is brought closer to the duck, the duck moves away because like poles of the two magnets repel each other.
   

6th Class Science 6th Lesson Fun with Magnets Activities

Activity – 1

1. Take a steel glass. Put a magnet in it. Take a needle through which thread is passed. Press the thread with a finger near the eye of the needle as shown in figure 2 and raise the glass upward slowly. (Page No. 60)

i) What happens?
Answer:
The needle stand vertically up without touching the glass.

ii) Does the needle stand vertically up without touching the glass? Why does this happen?
Answer:
Yes. This is because the magnet in the glass is attracting the needle.

Activity – 2

Finding Materials attracted by Magnets. (Page No. 61)

2. Take a bar magnet, nail, jump-clip, plastic scale, a piece of glass, key, paper, iron bolt, pen, blade, pencil, knife, stainless steel spoon, piece of chalk, wood, and touch the magnet to each item. Does the magnet attract every object? Observe and record your observations duly mentioning the name of the material of which the object is made in the table.

Answer:

i) Which materials are attracted by a magnet?
Answer:
Nail, jump-clip, key, iron bolt, blade, knife.

ii) Which materials are not attracted by a magnet?
Answer:
Plastic scale, a piece of glass, paper, pen, pencil, stainless steel spoon, piece of chalk, wood.

iii) Give your own examples for magnetic materials.
Answer:
Iron, cobalt, nickel.

iv) Give your own examples for non-magnetic materials.
Answer:
Gold, Silver, Copper, wood, paper, plastic.

Activity – 3

3. Spread some iron fillings uniformly on a sheet of paper. Place a bar magnet below this sheet. (Page No. 62)

i) What do you observe?
Answer:
I observe that the uniformly spread iron filings come close and get concentrate at two points of the paper sheet. At some distance, I found some scattered iron filings between these two points.

ii) Does the property of attracting iron filings remain the same for all parts of a bar magnet?
Answer:
No. the ends of the bar magnet attract more iron filings than the middle part of the magnet.

iii) Do you observe any change in the pattern of iron filings spread over the sheet?
Answer:
Yes, uniformly spread iron filings changed their pattern and concentrated more at endpoints of the bar magnet. Scattered iron filings between these two points are somehow in some lines from one point to other.

Activity – 4

4. Attraction and Repulsion between Two Magnets. Take two similar magnets, place them in four different ways as shown in Figure, and record your observations. (Page No. 63)

i) What do you observe?
Answer:
I observe that magnets not only attracts but also repel each other

ii) When do the magnets attract each other?
Answer:
In the first two situations, they attract each other. That means when unlike poles come close to each other they attract.

iii) When do the magnets repel each other?
Answer:
In the last two situations, they repel each other. That means when like poles come close to each other they repels.

Activity – 5

Finding directions with a bar magnet. (Page No. 63)

5. Suspend the bar magnet freely with the help of a thread tied around its center as shown in figure.

i) Does the magnet remain stationary?
Answer:
After some time it becomes stationary.

ii) Wait for some time. What do you find now?
Answer:
I found that the magnet rests in a north-south direction.
You will notice that the magnet finally takes a position in the North-South direction. Mark the endpoints towards the North with some color. Now disturb the magnet and again wait for some time.

iii) Where does the colored portion come to rest?
Answer:
The colored portion comes to rest towards the north.

iv) Repeat this experiment at another place. What do you observe?
Answer:
I observed that the magnets always come to rest in the North-South direction.

Activity – 6

Making Magnet (Page No. 64)

6. Aim: To make a magnet
What do you need? (Materials required): Iron nail/ piece of iron. Bar magnet, pin/ iron fillings.
What to do? (Procedure):

1. Take a nail /a piece of Iron and place it on a table.
2. 
3. Now take a bar magnet and place one of its poles near one edge of the nail / piece of iron and rub from one end to another end without changing the direction of the pole of the magnet.
4. Repeat the process for 30 to 40 times.
5. Bring a pin or some iron filings near the nail / piece of iron to check whether if has become a magnet.

What do you see?(Observation): The nail/ piece of iron attract the pin / iron filings. What do you learn? (Result): Iron nail,/ piece become a magnet.

Activity – 7

Making your own Magnetic Compass. (Page No. 65)

7. Aim: To make a magnetic compass
What you need? (Materials required: magnetized needle, tape, water, detergent.
What to do? (Procedure):

1. Take a magnetized needle.
2. Attach the needle with a tape to a light cork.
3. Float the cork in a glass of water.
4. Add a little detergent to the water to help the cork float freely.

What do you see? (Observation): The magnetized needle points in North- South direction.
What do you learn? (Result): This acts as a magnetic compass.

Activity – 8

Magnetic Induction (Page No. 65)

8. Aim: To observe and understand magnetic induction.
What you need? (Materials required): safety pin, alpin, bar magnet
What to do? (Procedure):

1. Take a safety pin and bring it close to an alpin.
2. Bring the safety pin close to one pole of a bar magnet and see how it gets attached to the magnet.
3. Now bring an alpin and touch it to the safety pin.

What do you see?(Observation):

1. Safety pin does not attract the Alpin when it is not in contact with magnet.
2. But when it is in contact with a magnet it attracts the alpin.
3. From the above two cases, we notice that the safety pin acts as a magnet when it is in contact with another magnet.

What do you learn? (Result): Magnetic property is induced in the safety pin due to the bar magnet. The magnetic property possessed by a magnetic substance due to the presence of a magnet near it, is called magnetic induction.

Activity – 9

9. Finding out whether the given object is a magnet or not. (Page No. 66)
You have been given three objects of the same size, shape and colour and a bar magnet. You have to decide which one among them is a magnet, which is not a magnet but made up of magnetic material or a non-magnetic material Bring three objects one after the other close to one pole of the bar magnet and observe whether they get attracted, repelled or not attracted. Record your observation in table 2. After that bring those objects close to the other pole of the bar magnet in the same way and record your observations.

Answer:

If an object is attracted by one pole of the bar magnet and repelled by its other pole, then it is a magnet. So object -1 is magnet.
If an object is attracted by both the poles of a bar magnet and not repelled by any pole, then it is not a magnet but a magnetic substance. So object -2 is made up of magnetic material.
If an object is neither attracted by a magnet nor repelled by it, then it is a non-magnetic substance. So object – 3 is made up of non- magnetic material.

AP State Syllabus AP Board 6th Class Science Important Questions Chapter 2 Knowing About Plants

AP State Syllabus 6th Class Science Important Questions 2nd Lesson Knowing About Plants

6th Class Science 2nd Lesson Knowing About Plants 2 Mark Important Questions and Answers

Question 1.
What are the types of venation?
Answer:
There are two types of venation 1. Reticulate venation 2. Parallel venation.

Question 2.
What are the functions of stomata?
Answer:
Stomata regulate the gaseous exchange between the plant and environment and transpiration.

Question 3.
What are the main parts of the plant?
Answer:
Roots, stem, leaves, flowers are the main parts of the plant.

Question 4.
How many types of root system? What are they?
Answer:
There are two types of root system. 1. Tap root system 2. Fibrous root system.

Question 5.
Give examples for the fibrous root system.
Answer:
Monocot plants have the fibrous root system. Ex. Grass, rice, wheat etc.

Question 6.
What is cotyledon?
Answer:
The seed leaf present within the seed is called cotyledon.

Question 7.
Give examples for monocots and dicots.
Answer:
Monocots: Grass, rice, wheat, maize etc.
Dicots: Mango, pulses, fruits

Question 8.
In a bean how many cotyledons are present?
Answer:
In a bean seed two cotyledons are present.

Question 9.
Which type of root system the dicot plants have?
Answer:
The dicot plants have tap root system.

Question 10.
Give examples of tuberous roots.
Answer:
Radish, carrot, beetroot, sweet potato are examples for tuberous roots.

Question 11.
What is stem?
Answer:
The main axis of the shoot system is called the stem.

Question 12.
What is a node ?
Answer:
Node is the part of stem where the leaf arises.

Question 13.
What is internode?
Answer:
The part of the stem between two successive nodes is called the internode.

Question 14.
In which plant do you observe the parallel venation ?
Answer:
In monocot plants such as grass, cereals, millet plants we will observe the parallel venation.

Question 15.
What is transpiration?
Answer:
Plants release excess of water in their body through stomata in the form of vapour is called transpiration.

Question 16.
What do you know about the flower?
Answer:
The flower is colourful and attractive part in a plant.

Question 17.
What are petals?
Answer:
The colourful and fragrant parts of a flower is petals.

Question 18.
How do you say the millet plant is a monocot?
Answer:
Millet has only one cotyledon in a seed. So, millet is a monocot.

Question 19.
Name the traditional food of Konaseema, prepared with the help of jackfruit leaves.
Answer:
Pottikkalu.

Question 20.
What type of venation is found in the leaves of plants with fibrous roots?
Answer:
Parallel venation is found in the leaves of plants with fibrous roots.

Question 21.
If the leaves have the reticulate venation what would be the type of root?
Answer:
The plants having the reticulate venation have the tap root system.

Question 22.
Give examples for modified stems.
Answer:
Potato, turmeric, garlic, ginger and sugarcane are examples for modified stems.

Question 23.
Define fibrous root system.
Answer:
A cluster of thin and uniform roots arising from the base of the stem is called fibrous root system.

Question 24.
Why Pottikkalu have jack fruit flavour?
Answer:
The leaves of jack fruit are used in the preparation of Pottikkalu. So, Pottikkalu have jack fruit flavour.

Question 25.
Give examples of plants having supporting roots.
Answer:
Banyan tree, Sugarcane and Maize plants have supporting roots which grown above the ground level.

6th Class Science 2nd Lesson Knowing About Plants 4 Mark Important Questions and Answers

Question 1.
Write the differences between potato and sweet potato?
Answer:

Question 2.
Write the differences between tap root system and fibrous root system?
Answer:

Question 3.
In drought conditions which root system is help the plant to survive?
Answer:

• When there is no rainfall for several years it leads to drought.
• When a drought hits, soil dries out, the crops with deep roots have access to deep stored moisture.
• The taproot system has the access to get the moisture from deep levels of the soil.
• So, tap root system help the plant to survive in drought conditions.

Question 4.
What are the differences between terminal bud and auxiliary bud?
Answer:

Question 5.
What are the stem modifications?
Answer:

• In some plants, the stems are modified to perform the function of storage of food, support, protection and vegetative propagation.
• Potato, turmeric, garlic, ginger, sugarcane store food materials in the stem so that the stem bulges in size. These are known as modified stems or tubers.

Question 6.
What is venation? What are the types in it?
Answer:

• The arrangement of veins in a leaf is called venation.
• There are two types of venation. 1. Reticulate venation 2. Parallel venation
• The veins are arranged in either web-like or network all over the lamina it is called reticulate venation.
• The veins are arranged parallel to one another all over the lamina is called parallel venation.

Question 7.
How do you distinguish the differences between reticulate and parallel venation?
Answer:

Question 8.
How do you find the root system without pulling it out?
Answer:

• It is possible to find the root system without pulling it out.
• By observing the leaf venation, we will identify whether that plant has tap root or fibrous roots.
• If the leaf is having a parallel venation, that root of the plant will be fibrous root system.
• If the leaf is having reticulate venation, that root of the plant will be a tap root system.

Question 9.
Write the differences between monocots and dicots?
Answer:

Question 10.
What are stomata? What is it importance?
Answer:

• The small pores present on the leaf surface is called stomata.
• The stomata act like our nose in the plant.
• These are helpful in the exchange of gases between the plant and the atmosphere.
• Plants release excess water in their body through stomata by the process of transpiration.

Question 11.
What are the functions of root?
Answer:

• Fixes the plant to the soil.
• Absorbs water and minerals from the soil.
• It stores the food in some plants like carrot and beet root.

Question 12.
What is transpiration and what its importance?
Answer:

• The process of releasing water in the form of vapour through stomata is called transpiration.
• It helps to keep the leaves healthy.
• It helps to provide water to leaf cells for photosynthesis.
• The temperature of the plant body maintained constant.

Question 13.
Write the functions of the stem?
Answer:
The stem,

• supports the branches, leaves, flowers and fruits.
• transports water and minerals from root to other parts.
• transports food from leaves to other parts through stem.
• stored food in the plant’s potato, ginger, turmeric, garlic, etc.

Question 14.
Which questions do you pose to know about the plants and its parts?
Answer:

• Which part of the plant absorbs water?
• What are the important parts in a plant?
• What is the function of stem?
• Why some of the roots are modified?

Question 15.
Write the functions of leaf.
Answer:
Leaves play an important role in the life of plant, they are

• help in respiration
• to carry out transpiration
• to prepare food by the process of photosynthesis

Question 16.
What are the root modifications?
Answer:

• In some plants, the roots change their shape and modified to store the food materials.
• The roots of radish, carrot, beet root modified to store the starch.
• Aerial roots grow above the ground, typically providing support to the plant.
  Ex: Banyan tree, sugarcane, Maize etc.
• In mangroves the aerial roots helpful in respiration.

Question 17.
Write about Pottikkalu?
Answer:

• Pottikkalu is a traditional food of Konaseema of Godavari districts.
• Leaves of jack fruit are used in its preparation.
• They make cups with these leaves and fill them batter made of black gram and rice rawa.
• These cups are steamed to get Pottikkalu. These are healthy and delicious with jack fruit flavour.

Question 18.
How do you appreciate the beauty of a flower?
Answer:

• Flowers are the colourful parts of the plants.
• They attract insects for pollination and produce fruits.
• Colourful flowers give beauty to nature.
• By seeing the colourful flowers, we get happiness and they give us a positive effect on mood.

Question 19.
What is a root? Write about its function?
Answer:

• The underground part of the main axis of a plant is known as the root.
• It fixes the plant to the soil.
• It absorbs water and minerals from the soil.
• It stores food in some plants like carrot and beet root.

Question 20.
Which roots are known as tuberous roots? Why?
Answer:

• Radish, carrot, beetroot, sweet potato is known as tuberous roots.
• These plants store food materials in their roots so that they were known as tuberous roots.

Question 21.
How will you tell which part of a plant is the stem and which is the root?
Answer:

• The part of the plant that presents above the surface of soil is the stem.
• The part of the plant that presents below the soil surface is the stem.
• Stem possess nodes, inter nodes and leaves etc. whereas root cannot have these.

Question 22.
What would happen if flowers do not have different colourful petals?
Answer:

• The flower has colourful parts called petals.
• The beautiful petals attract insects for pollination and produce fruits.
• If flowers do not have different colourful petals, they can’t have a fragrance to attract the insects.
• If the plant does not have colourful petals and fragrance, they cannot attract the insects so that fruits are not formed.

Question 23.
What questions do you ask to know more about the aerial roots of Mangroves?
Answer:

• What are mangroves?
• Where do we find these mangroves?
• What is the importance of mangroves?
• What is the special character of mangroves?

Question 24.
Fill the following table by observing the plant leaves?

Answer:

Question 25.
Draw the diagram of the tap root system and fibrous root system of a plant?
Answer:

6th Class Science 2nd Lesson Knowing About Plants 8 Mark Important Questions and Answers

Question 1.
What will happen if plants cannot store their food?
Answer:

• Plants can store their food by the process of photosynthesis.
• Some of the food is used by the plants for various metabolic processes.
• The remaining food is stored in the various parts of the body such as roots, stem, leaves, seeds, fruits etc.
• This stored food helps the plants to survive in unfavourable conditions.
• Other animals also depend on plants for their food.
• If the plants cannot store the food, the animals that depend on plants get hungry and gradually die.
• When unfavourable conditions like drought appear, the plants will also ultimately die.

Question 2.
How do you prove that stem conducts water?
Answer:
Aim: To observe the conduction of water by a stem.
What you need: A small twig of balsam plant, a glass of water, red ink.
What to do:

• Take a glass of water and add a few drops of ink to it.
• Now place the small twig in the water.

What do you see: The stem turns reddish.
What do you learn: The red ink is taken and transported by the stem upwards.

AP State Syllabus AP Board 6th Class Science Important Questions Chapter 1 The Food we Need

AP State Syllabus 6th Class Science Important Questions 1st Lesson The Food we Need

6th Class Science 1st Lesson The Food we Need 2 Mark Important Questions and Answers

Question 1.
What is the theme of World Food day 2019?
Answer:
The World Food day theme was “Zero Hunger”.

Question 2.
What are ingredients?
Answer:
The materials which are required to prepare food are known as Ingredients.

Question 3.
What are the different food sources for human beings?
Answer:
Plants, animals and seawater are the food sources for human beings.

Question 4.
Write the ingredients to prepare chicken curry.
Answer:
Chicken, tomato, chilli powder, turmeric powder, garam masala, cinnamon, ginger and garlic paste, oil, onion, salt and coriander leaves.

Question 5.
Which food item do you like? Why?
Answer:
I like payasam because I like the food items which are sweety in taste.

Question 6.
Give some examples of cereals.
Answer:
Rice, Wheat, Maize, etc.

Question 7.
What are the food items that are taken in breakfast?
Answer:
Idli, dosa and chutney, bread, milk, egg are the food items that are commonly taken in breakfast by different people.

Question 8.
What are the different methods used in the preparation of food?
Answer:
Boiling, Steaming, Fermentation, Roasting, Deep frying are the different methods used in the preparation of food.

Question 9.
Why rice items are very common in our area?
Answer:
In our state, geographical and climatic conditions are more suitable for growing rice. So we prefer rice items more in our area.

Question 10.
What is FAO?
Answer:
Food and Agriculture Organisation.

Question 11.
Expand UNDP.
Answer:
United Nations Development Programme.

Question 12.
What is boiling?
Answer:
It is a food preparation method used to make the food items Rice, dal, eggs and potato etc.

Question 13.
Give examples of food items prepared by the fermentation process.
Answer:
Bread, Jilebi, Cake, Dosa, Idli are the food items prepared by the fermentation process.

Question 14.
List out the junk foods that are commonly eaten by us.
Answer:
Pizza, Burger, Chips, Fried fast food, Noodles, Samosa, French fries, etc. are junk foods.

Question 15.
What is vegetable carving?
Answer:
Making of different types of designs and decorations with vegetables is called vegetable carving.

Question 16.
What are natural preservatives?
Answer:
Salt, oil, turmeric powder, sugar and honey are natural preservatives.

Question 17.
Give examples of artificial preservatives.
Answer:
Benzoates, Nitrates, Sulphates are artificial preservatives.

Question 18.
How does food get its taste?
Answer:
The taste of food depends on its ingredients, method of preparation and cultural habits.

Question 19.
What do we get from animals?
Answer:
We get milk, meat, egg and honey from animals.

Question 20.
Give examples of the stem that stores food.
Answer:
Sugarcane, onion, garlic, turmeric, ginger plants store food in the stem.

Question 21.
Why do we keep certain fruits in sugar syrup or honey?
Answer:
Sugar syrup or honey is used in the canning and freezing of fruits to improve its flavour and to preserve its natural colour and taste.

Question 22.
Name the vegetables/fruits that are used in the preparation of pickles.
Answer:
Mango, lemon, tamarind”, amla, tomato, chillies etc.

Question 23.
Why fishes are dried or smoked?
Answer:
Drying and smoking is help to reduce the moisture content in fish. So that it can be preserved properly without getting spoiled.

Question 24.
Is there ‘any a relationship’ of food habits and growing crop for that particular
area?
Answer:
Yes. People living in one region thy have some food habits. So that farmers cultivate that type of food crops which are suitable for that geographical and climatic conditions.

Question 25.
What are the common ingredients that used in making pickles?
Answer:
Salt, oil, turmeric powder, chilli powder, garlic, fenugreek powder and asafoetida are commonly used ingredients in the preparation of pickles.

Question 26.
What are the different food items that are prepared by using rice?
Answer:
Idli, dosa, dal rice, vegetable rice, biryani, Pongal, kichadi are the food items prepared by using rice.

6th Class Science 1st Lesson The Food we Need 4 Mark Important Questions and Answers

Question 1.
We take some of the food in large quantities whereas the others in small quantity. Why is it so?
Answer:
Body needs calories to perform the metabolisms.

• Our body needs calories so that we take carbohydrate rich food in large quantities.
• Proteins are the body building nutrients which are necessary for growth and development.
• • Vitamins and minerals are present in vegetables and fruits. These nutrients required to our body in small quantities.

Question 2.
What are the Indian spices? What is its role in the preparation of food?
Answer:

• Indian spices are aromatic parts of a plant which are added in a variety of dishes.
• We get spices from the bark and roots of certain plants, leaves, flowers or stems of the plant.
• These are used for the flavouring, colouring or preserving food.
• Ex. Cardamom, black pepper, curry leaves, fenugreek, fennel, ajwain, bay leaves, cumin, coriander leaves, turmeric, cloves, ginger, nutmeg and cinnamon.

Question 3.
Ramu said that all food items are sources of plants and animals. Do you support this statement? Why? Why not?
Answer:

• Vegetables, fruits, cereals and pulses etc. are the ingredients obtaining from the plants.
• Egg, milk, meat etc are the food ingredients obtaining from the animals.
• So, I support this statement as all these food ingredients are derived from the plant and animal sources.
  (OR)
• We get food from plants and animal sources.
• At the same time salt is derived from the other sources.
• Salt is an important ingredient for preparing the all food items.
• So that I can’t support the statement that all food items are sources of plants and animals.

Question 4.
What questions do you pose to know about the food sources of human being?
Answer:

• Where do we get ingredients?
• Where does the food ingredients of food come from?
• What are the main food sources?
• Is there any source other than plants and animals?

Question 5.
How will you appreciate plants and animals in the view of food sources?
Answer:

• Plants and animals are the main food sources for us.
• We get vegetables, fruits, cereals and pulses etc. from the plants.
• We get milk, meat, egg and honey from the animals.
• If we have not these food sources on earth the existence of life become impossible.

Question 6.
What are the effects of the junk foods on human health?
Answer:
Eating of junk food causes,

• increased obesity,
• loss of memory and learning problems,
• worsens appetite and digestion,
• inadequate growth and development,
• heart diseases and stroke.

Question 7.
Prepare some slogans to avoid the junk food.
Answer:

1. Know your health -Say no to junk food
2. Fast food – Fast death
3. Put junk food into dustbin not into the stomach
4. Eating pizzas and burgers daily, gives you a round belly
5. Junk food is an injurious to health

Question 8.
Write about the steaming process.
Answer:

• Steaming process is a method of preparation of food.
• In this process boiling of water causes it to vaporize into steam.
• The steam carries heat to the food, thus cooking the food.
• Idli, cake, egg is cooked by steaming process.

Question 9.
Why do you follow different methods for preparing the food?
Answer:

• Preparation of food is an art. It is prepared in different ways.
• There should be no loss of nutrients while cooking.
• Some food items are delicious in certain food preparing methods.
• The taste of the food depends on its ingredients and the method of preparation also. So that we use different methods for preparing the food.

Question 10.
Why do we preserve the food?
Answer:

• Food preservation is the process of treating and handling food to stop or slow down spoilage.
• It provides food availability throughout the year.
• Food preservation stop the food wastage.
• If food is not preserved properly, it can attack by microorganisms that lead to spoilage of food.

Question 11.
What are preservatives? What is it need?
Answer:

• The materials or substances that use in preserving food are called preservatives.
• The preservatives may be natural such as salt, oil, turmeric powder, sugar, honey and artificial such as Benzoates, Nitrates, Sulphates.
• Preservatives are essential to preserving food properly.
• Preservatives keep food fresher for longer periods of time and prevent spoilage of food.

Question 12.
Natural preservatives are more preferable than artificial preservatives? Why?
Answer:

• Natural preservatives include salt, oil, turmeric powder, sugar and honey.
• The artificial preservatives are prepared by using some chemicals.
• The natural preservatives retain the nutritional value of the food items, whereas
  artificial preservatives reduce the moisture level in the food and they slow down the nutritional value of the food.
• Artificial preservatives are also harmful to our health.
  So that natural preservatives are more preferable than artificial preservatives.

Question 13.
What are the Indian traditional preservative methods?
Answer:

• Generally, some food items are salted and dried for preservation Ex: Mango; tomato, fish, appeal, vadiyalu.
• Salt, turmeric powder, chilli powder and oil are added while making pickles.
• Fish, meat, vegetables are freeze in refrigerators.
• Certain fruits are preserved in sugar syrup or honey.

Question 14.
What are the preservative techniques used in the preparation of pickles?
Answer:

• To prepare a pickle, we need some preservative ingredients such as salt, edible oil, red chilli powder, fenu greek powder, mustard powder, turmeric powder, garlic and asafoetida.
• Salt and turmeric powder control the growth of micro-organisms.
• Garlic and asafoetida add flavour and taste to the pickle.
• And other preservatives are used to taste and preserve the pickle for few months.

Question 15.
List out the healthy food habits.
Answer:

• Eat a variety of vegetables and fruits every day.
• Drink fat-free and low-fat milk for every day.
• Don’t take junk foods.
• Drink plenty of water instead of sweetened drinks and cool drinks.

Question 16.
Write about millets.
Answer:

• Millets are stapled food and important sources Of nutrients.
• They contain energy source, proteins and fibres.
• Ex. Finger millets (raagulu), Pearl millets (sajjalu), Great millets (Jonnalu), Foxtail millets (Korralu), Proso millets (samalu) etc.
• Millets are good for health.

Question 17.
Which day is celebrated as World Food Day? What is the aim of the celebration of world food day?
Answer:

• World Food Day is celebrated every year across the world on 16 th October.
• To promote worldwide awareness on the problem of hunger, malnutrition, and poverty as well as focus attention on agriculture and food production.

Question 18.
Plant roots are also food sources for human beings. How do you support this statement?
Answer:

• Carrot, beetroot, sweet potato, radish store food materials in their roots.
• These tuberous roots are used as food sources for human beings.
  Thus, plant roots are also a food sources for human beings.

Question 19.
How do you prevent the wastage of food?
Answer:

• By using of proper storage methods.
• Avoid the optimum temperature.
• Decrease the water percentage up to 5%.
• Adding the preservatives.

Question 20.
How will you appreciate people who offer food to the needy?
Answer:

• It is a very great attitude to offer food for the needy.
• It avoids the hunger for the world.
• It increases empathy in society.
• It is an opportunity to show their humanity towards the needy.

6th Class Science 1st Lesson The Food we Need 8 Mark Important Questions and Answers

Question 1.
To present a symposium in your school, prepare a note about junk food.
Answer:

• Junk food containing high levels of calories with less vitamins and minerals.
• Most of the fast-food is junk food.
• Pizza, burger, chips, fried fast food, samosa, French fries etc. are junk foods.
• Junk foods do not contain nutritional value.
• Junk food is not easy to digest.
• Eating Junk food causes obesity, digestion issues and loss of appetite.
• It causes drowsiness and harmful to health.
• It causes diabetes, cholesterol and heart diseases.

AP State Syllabus AP Board 6th Class Science Solutions Chapter 10 Basic Electric Circuits Textbook Questions and Answers.

AP State Syllabus 6th Class Science Solutions 10th Lesson Basic Electric Circuits

6th Class Science 10th Lesson Basic Electric Circuits Textbook Questions and Answers

Improve Your Learning

Fill in the Blanks.

1. The flow of electricity in a circuit is called ——–.
Answer:
current
2. A ——– helps us to allow or break the flow of electricity in a circuit.
Answer:
switch
3. Substances that allow electricity to pass through them are known as ——–.
Answer:
conductors
4. The electric bulb was invented by ——–.
Answer:
Thomas Alva Edison

Choose the correct answer.

1. In a bulb the part which gives us light is
A) Metal Base
B) Glass Chamber
C) Filament
D) Terminals
Answer:
C) Filament

2. Which of the following is an insulator?
A) Hairpin
B) Iron Nail
C) Plastic Scale
D) Pencil Lead
Answer:
C) Plastic Scale

3. The metal used in making filaments of present-day bulbs is
A) Iron
B) Copper
C) Tungsten
D) Cotton
Answer:
C) Tungsten

Answer the Following Questions.

Question 1.
What is an electric circuit? Explain with a diagram.
Answer:

1. An arrangement in which a cell and a bulb are connected by using wires is called a simple electric circuit.
   
2. A simple electric circuit is a path for the flow of electric current between cell and the bulb.

Question 2.
What are the parts of a torchlight?
Answer:
The parts of a torchlight are

1. Hollow cylindrical barrel
2. Torch cells
3. Bulb
4. Glass cover
5. Reflector
6. Switch
7. Metal spring

Question 3.
Classify the following into conductors and insulators:
Water, Plastic pen, Pencil lead, Dry cotton cloth, Wet cotton cloth, Dry wood, Wet wood.
Answer:

Question 4.
What will happen if the cells in a torch are arranged as shown in the following figure? Why?

Answer:

1. The bulb does not glow.
2. Because two positive terminals of the cells are connected to each other which does not provide a closed path.

Question 5.
Niharika observed an electrician repairing a street light wearing gloves on his hand. She asked him some questions. What would be those questions?
Answer:

1. Why do you wear gloves?
2. With what the gloves are made up of?
3. How do these gloves help in your work?
4. What will happen if the glows are made up of cloth instead of rubber?

Question 6.
A circuit is connected with a cell, bulb, and a switch, but the bulb is not glowing. Write all possible reasons for this.
Answer:

1. The cell used might have been totally discharged.
2. The bulb taken might have been fused.
3. The switch arranged may not be in touch with the wires as expected.
4. Any breakages in the circuit cause failure.

Question 7.
How do you test the materials given to you, to know whether they are conductors or insulators?
Answer:
Aim: To test the given materials to know whether they are conductors or insulators What you need? (Materials required): a cell (power source), a bulb, connecting wires, wooden plank or thermocol sheet, two drawing pins, and the materials provided to test.
How to do? (Procedure):

1. Connect a circuit on a wooden plank or on a thermocol sheet as shown in Fig.
   
2. Insert two drawing pins at A and B.
3. insert the given materials in the gap between A and B one after another.
4. With each insertion, check whether the bulb glows or not.

What do you see? (Observation): The bulb glows only when some materials like a safety pin, iron nail were inserted. It does not glow when the materials like paper, eraser were inserted.
What do you learn? (Result): Bulb glows only when an electric current passes through the materials. So all the materials which made the bulb glow are conductors and the remaining are insulators.

Question 8.
Draw a circuit diagram showing a cell, switch, and bulb.
Answer:

Question 9.
If you put the switch on, a light will glow, a fan will rotate, an iron box heats up etc. All these different functions will be performed by electricity. How do you feel about the comforts given by this great invention to human beings?
Answer:

1. Electricity plays a key role in modern technology.
2. Without electricity, most of the things could never work. (i.e. TV, Computer, bulb, etc…)
3. We can’t imagine our life without electricity.
4. Electricity is a gift given by scientists to human beings.
5. Electricity is a basis for new inventions.

Question 10.
List the daily activities in which we use electricity.
Answer:
Following are our daily activities in which we use electricity.

1. Electric bulb and fluorescent lights etc.
2. Washing machine and Grinder
3. Electric fan and Electric iron
4. Television and Tape recorders
5. Computers and Motors to lift water etc.

Activities and Projects

6th Class Science Textbook Page No. 115

Question 1.
In activity 4, we observed some situations where the torch bulb glows. Niharika challenged her friends that she could make the bulb not glow even with the cells kept in the proper position. What would she have done?
Answer:

1. Niharika might have put an insulator in between the two cells.
2. Or she might have used the powerless batteries.

Question 2.
Connect a circuit as shown in the given diagram.

a) Does the bulb glow? Why?
b) Draw the circuit so that the bulb glows.
c) Verify it by connecting cells and bulbs as per the circuit drawn.
Answer:
a) The bulb does not glow. As the positive terminals of the two cells are connected. So current does not flow and bulb does not glow.
b)

c) I have connected the circuit as shown in (b) and found the bulb glowing.

Question 3.
You have studied the story of Thomas Alva Edison. Write a note appreciating his efforts in inventing the bulb.
Answer:

1. Thomas Alva Edison was a famous scientist who invented the bulb.
2. He experimented with a number of different filaments.
3. His goal was to find materials that would light well and last for a long time.
4. Though he failed a number of times he worked hard continuously to get success.
5. Without an electric bulb, we can’t imagine our life.

Question 4.
Connect circuits as shown in the following figure. Write your observation in each case.

Answer:
a) The bulb does not glow as the +ve terminals of the two cells are directly connected.
b) The bulb glows as the cells are connected correctly.
c) The bulb glows and gives dim light as only one cell is connected.
d) The bulb glows brilliantly as the three cells are connected in series and more current flows in the bulb.

6th Class Science 10th Lesson Basic Electric Circuits Activities

Activity – 1

1. Let us take a torch cell and observe it. Can you describe it? (Page No. 108)
Answer:

1. The cell consists of a cylindrical metal can.
2. Its heaviness suggests that it is filled with some chemicals.
3. The protrusion on one end is due to a carbon rod in the centre.
4. At the top of the cell, a metal cap is fixed.
5. This metal cap act as the positive (+) terminal of the cell.
6. Opposite to this, the bottom of the cell (metal can) act as a negative (-) terminal of the cell.
7. The entire can is sealed.
8. Positive and negative terminals of the cell are labelled on it as + and – respectively.

Activity – 2

Simple electric circuits (Page No. 108)

2. Take four wires of different colours, say blue, green, red and yellow, each about 15 cm long. Electric wires are often covered with plastic. First, remove about two centimetres of the plastic covering, from both ends of each wire. Now attach two wires (Blue and Green) to a bulb and two wires (Red and Yellow) to a cell with a cello-tape or cell-holder as shown in Fig. 4(a). We can use a cell holder to hold the cells and wires together tightly.
Now connect the wires in different forms as shown in Fig. 4(b) to 4(g). In each case, check whether the bulb glows or not. Record your observations in Table 1.

Answer:

• In which case does the bulb glow? Why?
  Answer:
  The bulb glows in connections shown in Fig. 4(d) and Fig. 4(e). This is because in these connections form a closed path.
• In which case the bulb does not glow? Why?
  Answer:
  In the remaining cases means like in Figs. 4(b), 4(C), 4KO, and 4(g), bulb does not glow.
  This is because there is some gap in the path. (circuit is open)

Activity – 3

Electric Switch (Page No. 110)

3. Connect a circuit on a wooden plank or on a thermocol sheet as shown in Figure. Insert two drawing pins at A and B. Insert a safety pin in between A and B. such that one end of the pin is completely in contact with B and the other end is left free. Now observe the bulb.

• What do you notice?
  Answer:
  The bulb does not glow.
  Now touch the safety pin to pin A and observe the bulb again.
• What happens?
  Answer:
  The bulb glows.
• Why doesn’t the bulb glow when the safety pin is left free at one end?
  Answer:
  In this activity, the safety pin is used to close /open the circuit. When the safety pin is left free at one end, the circuit is open. So the bulb doesn’t glow.

Activity – 4

4. Take a torch that has two cells. Arrange the cells in the torch in as many ways as you can. In which cases does the bulb glow and in which cases it doesn’t? Draw pictures showing different positions of cells and glowing of bulb. Can you find out why the bulb glows only when cells are placed in a particular position? (Page No. 111)

Answer:
The bulb glows only in the first position. This is because in the remaining positions the circuit is being open as the cell’s terminals are not in a proper sequence. In the first position they are in proper sequence, so the circuit is closed. As a result the bulb glows.

Activity – 5

Identifying conductors and insulators (Page No. 111)

5. Take the circuit which we used in activity-3, as shown in Figure. Remove the safety pin from the drawing pins so that you have two open terminals A and B.

Insert different objects like a hair pin, safety pin, eraser, plastic scale, match stick, piece of a metal bangle, piece of a glass bangle, paper clip etc. in the gap between A and B. With each insertion, check whether the bulb glows or not. Record your observations in table 2 for each case.
Answer:

• If you look at table 2, after recording your observations you will find that the bulb glows in some cases and does not glow in other cases. Can you guess the reason?
  Answer:
  Bulb glows in some cases as they allow an electric current to pass through them. They are conductors.
  Bulb does not glow in other cases as they do not allow the electric current to pass through them. They are insulators.
• Can you group the objects you observed in your daily life as conductors and insulators? Make a list of objects and group them as conductors and insulators and write in table-3
  Answer:

  S.No.	Conductors	Insulators
  1	Metals	Water
  2	Iron	Air
  3	Silver	Plastic
  4	Salt water	Wood
  5	Copper	Rubber
  6	Aluminium	Paper