Question

Q. With reference to temperature variations on the Earth, consider the following statements:

Which of the following statements is/are correct?

• A.
  1 only
• B.
  2 only
• C.
  Both 1 and 2
• D.
  Neither 1 nor 2

Answer 1

The correct option is C

Both 1 and 2
Explanation:

Statement 1 is correct: The atmosphere is indirectly heated by terrestrial radiation from below in the troposphere, a layer which is closest to the Earth’s surface. Therefore, the warmest temperatures in the troposphere are near the surface with the coldest temperatures being at the top of the troposphere.

Statement 2 is correct : Compared to land, the sea gets heated slowly and loses heat slowly. Land heats up and cools down quickly. Hence, The variation in temperature over the seas is less compared to land.

Extra Information: The rate of decrease of temperature with height is termed as the normal lapse rate. It is 6.5 ‘C per 1000m. The temperature of the air at any place is influenced by (i) the latitude of the place; (ii) the altitude of the place, (iii) distance from the sea, (iv) the presence of warm and cold ocean currents (v) local aspects