Answer:
SAMPLE: When we heat air, the molecules jiggle and zip around faster, which causes them to spread out. When a mass of air takes up more space, it has a lower density. ... Warm air rises when it's surrounded by cold air because of its lower density.
Explanation:
What this means is that when it is hot outside, molecules move faster and faster. This propels the molecule up since the molecule cannot handle low density. This is because when molecules occupy space and a molecule is moving very fast, it needs as much space as possible to move.
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