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.
→ Solar radiation is radiant electromagnetic energy emitted by the Sun.
→ 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.