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7th Class Science Winds, Storm and Cyclones Question Bank Winds, Storms and Cyclones

  • question_answer
    Warm air is lighter than cold air. Why?

    A)  Warm air has more pressure.

    B)  Molecules are closer in warm air.

    C)  Warm air expands and becomes lighter.

    D)  Both (A) and (B)

    Correct Answer: C

    Solution :

    Warm air is lighter than cold air because the air in contact with the hot surface of the earth gets heated up, so it expands and becomes lighter.


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