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3
Q:

Which best describes how air moves during convection?

A) cool air falls down B) warm air falls down
C) cool air is replaced by warm air D) air always falls down

Answer:   A) cool air falls down



Explanation:

During convection, cool and dense air falls through the warmer and less dense air. The warm air having less mass is being displaced by the cooler which is much heavy. Convection always involves the air rising through the atmosphere.

 

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