Structure Of Atmosphere

5 Questions
  1. 1
    Consider the following statements :
    1. Statement-I : Thickness of the troposphere at the equator is much greater as compared to poles.
    2. Statement-II : At the equator, heat is transported to great heights by strong convectional currents.
    Which one of the following is correct in respect of the above statements ?
    UPSC CSE I - 2024
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    Answer: A. Both Statement-I and Statement-II are correct and Statement-II explains Statement-I

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  2. 2
    The jet aircrafts fly very easily and smoothly in the lower stratosphere. What could be the appropriate explanation ?
    1. There are no clouds or water vapour in the lower stratosphere.
    2. There are no vertical winds in the lower stratosphere.
    Which of the statements given above is/are correct in this context ?
    UPSC CSE I - 2011
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    Answer: C. Both 1 and 2

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  3. 3
    A layer in the Earth's atmosphere called Ionosphere facilitates radio communication. Why ?
    1. The presence of ozone causes the reflection of radio waves to Earth.
    2. Radio waves have a very long wavelength.
    Which of the statements given above is/are correct ?
    UPSC CSE I - 2011
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    Answer: D. Neither 1 nor 2

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  4. 4

    The correct sequence of different layers of the atmosphere from the surface of the Earth upwards is:

    UPSC CSE I - 1998
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    Answer: C. Troposphere, Stratosphere, Mesosphere, Ionosphere

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  5. 5

    Which one of the following layers of the atmosphere is responsible for the deflection of radio waves?

    UPSC CSE I - 1996
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    Answer: D. Ionosphere

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