Students can go through AP State Board 7th Class Science Notes Chapter 8 Air, Winds, and Cyclones to understand and remember the concept easily.
AP State Board Syllabus 7th Class Science Notes Chapter 8 Air, Winds and Cyclones
→ The air around us is rarely still.
→ Air exerts pressure.
→ Air expands on heating.
→ Hot air is lighter than cold air.
→ We get a land breeze and sea breeze.
→ Regions close to the equator get more heat from the sun.
→ Increased wind speed is accompanied by reduced air pressure and this aids rains
→ Farmers in our country mainly depend on rains for their harvests.
→ Cyclones are a form of violent storms on earth.
→ Tropical cyclones are like giant engines that use warm moist air as fuel.
→ Factors like wind speed, wind direction, temperature, and humidity contribute to the development of cyclones.
→ Cyclones can be very destructive.
→ Wind speed plays an important role in the formation of storms.
→ Air is everywhere.
→ The moving air is called wind.
→ The air around us exerts pressure.
→ Air expands on heating and contracts on cooling.
→ Warm air rises up whereas comparatively cooler air tends to sink towards the earth’s surface.
→ As warm air rises air pressure at the place is reduced and the cooler air moves into that place.
→ Uneven heating on the earth causes wind movements.
→ Cyclones may be caused due to wind traveling at high speed due to differences in air pressure.
→ It has become easier to study cyclones with the help of advanced technology like satellites and radars.
→ Wind: The moving air is called wind
→ Expansion: Spreading out
→ Anemometer: Instrument for recording wind speed
→ Cyclone: A violent circuLar or rotatory storm
→ Low pressure: Small force
→ High pressure: High force
→ Thomas Alva Edison:
Edison was an American, inventor The incandescent lamp, the phonograph, the carbon telephone transmitter, and motion pictures, storage batteries, dictating machines, and micrograph duplicating the machine are some of the inventions of Edison. According to Edison, a genius is created by 1% of inspiration and 99% of perspiration.
Edison was born on 11-2-1847 in Milan, Ohio. His father was a carpenter and his mother was a teacher On 18-10-1913 Edison died.