# AP Board 8th Class Social Studies Notes Chapter 2 Energy from the Sun

Students can go through AP State Board 8th Class Social Studies Notes Chapter 2 Energy from the Sun to understand and remember the concept easily.

## AP State Board Syllabus 8th Class Social Studies Notes Chapter 2 Energy from the Sun

→ Solar energy is obtained from sunlight.

→ Temperature varies from place to place on the earth.

→ Temperature and rainfall affect life in very critical ways.

→ Greenhouses are built to grow plants with artificial protection.

→ Light, heat, UV rays, radio waves, and X-rays are some aspects of the Sun’s energy.

→ The incoming solar radiation is known as insulation.

→ The temperature distribution over land and oceans is much different and varying.

→ The earth’s heat balance enables mankind to live on it.

→ Scientists have recorded the highest and lowest temperatures on the earth.

→ Six maximum, the minimum thermometers can be used for measuring the temperature of a place.

→ Different places have different temperatures.

→ Temperature differs on the top of a mountain and changes as we go north or south from the equator. Places near and far from the sea have different temperatures.

→ Two types of climates are there: Moderate and extreme climates.

→ Atmosphere: The gases that surrounded the earth.

→ Equatorial regions: The places or areas near the equator.

→ Condensation: Water from humid air collecting as droplets on a cold surface.

→ Solar Radiation: Energy sent out by the sun as electromagnetic waves or subatomic particles.

→ Insolation: The solar radiation received on the surface of the Earth is called insulation.

→ The angle of Incidence: Falling of sun’s rays 90° on the equator and slantingly towards the poles.

→ Heat Balance: The Earth with its atmosphere radiates back some of its insolation. This balances the temperature on the earth.

→ Maximum Temperature: The highest temperature of a certain area during a day.

→ Minimum Temperature: The lowest temperature of a certain area during a day.

→ Temperature inversion: Temperature distribution depends on some factors. If it happens against these factors, it is called temperature inversion (sometimes).

→ Global Warming: An increase of CO2 in the atmosphere increases global temperatures. This ¡s called Global Warming.