SSC
WORLD GEOGRAPHY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What effect does cool temperature have on air?
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It causes air to sink.
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It causes air to blow clockwise.
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It causes air to rise.
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It causes air to blow counterclockwise.
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Explanation:
Detailed explanation-1: -Cold air is more dense than warm air, i.e., it weighs more. As a result, it tends to sink. Warm air, on the other hand, is less dense. Therefore, it weighs less and tends to rise.
Detailed explanation-2: -Hot air expands, and rises; cooled air contracts – gets denser – and sinks; and the ability of the air to hold water depends on its temperature. A given volume of air at 20°C (68°F) can hold twice the amount of water vapor than at 10°C (50°F).
Detailed explanation-3: -Warm air rises, creating a low pressure region, and cool air sinks, creating a high pressure zone.
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