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ICSE Class 9 Geography Question 10 of 19

Composition and Structure of the Atmosphere — Question 18

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Question

Question 18

Assertion (A): The troposphere is heated more from below than from above.

Reason (R): The troposphere is heated by the incoming solar energy.

  1. Both A and R are true and R is the correct explanation of A.
  2. Both A and R are true but R does not explain A.
  3. A is true but R is false.
  4. A is false but R is true.
Answer

A is true but R is false.

Explanation — The troposphere is not directly heated by incoming solar energy as incoming solar energy directly heats the earth's surface more than the air. The earth's surface absorbs solar radiation and then re-radiates heat upward, warming the troposphere from below.