Insolation and Temperature — Chapter Summary
ICSE · Class 11 · Geography
Summary of Insolation and Temperature for ICSE Class 11 Geography. Part of the ICSE Class 11 Geography syllabus.
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Overview
Insolation is the incoming solar energy received by Earth, and temperature is the measure of the degree of hotness of air, land, or water. Earth receives only one in two billion parts of the Sun's total radiation, yet this small amount controls major physical and biological processes. The chapter ex
Key Concepts
The Sun is an extremely hot
The Sun is an extremely hot gaseous spherical mass with a surface temperature of 6000°C. It continuously radiates heat energy into space. Earth is abo
Radiant energy from the Sun
Radiant energy from the Sun that strikes the Earth is called insolation. It is received in the form of short waves. At the outer limit of the atmosphe
Of 100 units of solar radiation
Of 100 units of solar radiation received, 51 units reach the Earth and 49 units are reflected back. Of the reflected amount, 6 units are scattered int
Up to 38° north and south
Up to 38° north and south latitudes, incoming solar radiation is greater than outgoing terrestrial radiation, so there is surplus energy. Beyond these
Insolation depends on the inclination
Insolation depends on the inclination of the Sun's rays, length of the day, transparency of the atmosphere, distribution of land and water, slope of l
Learning Objectives
- Understand solar radiation and the meaning of insolation
- Explain the Earth's heat budget and latitudinal heat balance
- Identify factors that control insolation and temperature
- Describe how the atmosphere is heated by radiation, conduction, convection, and advection
- Compare insolation with temperature and understand their difference
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Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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