Q&A – Insolation and temperature


  1. By which process heat energy travels from the sun to the earth?
  2. What part of solar radiation is received by the earth’s surface?
  3. Name the process in which heat is transferred by winds.
  4. Name the three factors influencing the amount of insolation received at a place.
  5. Insolation comes to the earth’s surface in –
  6. Atmosphere is heated by –
  7. Even after the sunset the air near the earth’s surface continues to receive heat by –
  8. What percentage of insolation is received by the earth?
  9. What part of the incoming solar radiation is reflected back to space from the top of the atmosphere?
  10. Name the regions of surplus heat.
  11. Which is the region of deficit heat?
  12. Terrestrial radiation is the amount of heat radiated by the –
  13. Quito has lower temperature than that of Guayanquil because Quito is situated at –
  14. Verkhoyansk has very high annual range of temperature because it is located –
  15. Give a geographical term for each of the following statements :
    1. The process of horizontal transport of heat by winds.
    2. Imaginery lines on a map joining the places of equal temperature, reduced to sea level.
    3. Difference between the mean temperatures of the hottest and that of the oldest month.
  16. Temperatures decrease with increase in –
  17. The normal lapse rate is 60C per –
  18. The phenomenon in which temperature increases with increasing altitude is known as –
  19. True or False :
    1. Cold air is light.
    2. Cold air is dense.
    3. Clear sky dry air and absence of winds causes rapid radiation leading to the phenomenon of inversion of temperature.
    4. Inversion of temperature occurs very frequently in plain
    5. Apple growers of the Himachal Pradesh avoid lower slopes
    6. The cool and dense air sliding down the mountain slopes pushes the comparatively warm and light air of valleys of words.
    7. Inversion of temperature occurs locally and temporarily.


  1. Radiation
  2. Two billionths part
  3. Advection
  4. (i) Angle of incidence, (ii) Duration of the day and (iii) Transparency of the atmosphere
  5. short waves
  6. heat radiation from the earth
  7. terrestrial radiation
  8. 51%
  9. 6%
  10. Tropical Region
  11. Polar region
  12. earth
  13. higher altitude
  14. in the interior parts of Asia
  15. .
    1. Advection
    2. Isotherms
    3. Annual range of temperature
  16. altitude
  17. 1000 metres
  18. inversion of temperature
  19. .
    1. False
    2. True
    3. True
    4. False
    5. True
    6. True
    7. True

Try yourself

  • Define the following terms :
    • Heat Budget
    • Latitudinal Heat Balance
    • Global Warming
  • What is meant by normal lapse rate?
  • What is insolation?
  • Define terrestrial radiation.
  • At which rate does temperature decrease with increase in altitude?
  • Explain –
    • Distribution of temperature in the world in January
    • Heat Budget
    • Latitudinal heat balance
  • Compare January & July isotherms.
  • Describe the factors that influence the horizontal distribution of temperature.
  • Why do different parallel of latitude receive different amount of insolation?


Bibliography : NIOS Geography Book
Reference : http://www.nios.ac.in


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