Q2 of 16 Page 27

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Which of the following layers of atmosphere is free from clouds?


(a) Troposphere.


(b) Stratosphere.


(c) Mesosphere

This layer is almost free from clouds and associated weather phenomenon, making conditions most ideal for flying aeroplanes.

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2

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Which of the following gases protects us from harmful sun rays?


(a) Carbon dioxide.


(b) Nitrogen.


(c) Ozone.

 2

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The most important layer of the atmosphere is.


(a) Troposphere.


(b)Thermosphere.


(c) Mesosphere

 2

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As we go up the layers of the atmosphere, the pressure


(a) Increases.


(b) Decreases.


(c) Remain same.

 2

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When precipitation comes down to the earth in the liquid form, it is called


(a) cloud


(b) Rain


(c) Snow