Question

Hot air and cold air

Answer 1

Explanation:

When air becomes hot it is because it is absorbing energy in the form of heat. The absorbed energy makes the molecules in air move and expand, therefore decreasing the airs density. The opposite is true for cold air.

Answer 2

$answer$

Hot air is less dense than cold air, which is why hot air rises and cold air sinks, according to the United States Department of Energy. ... The sun plays a major role in heating the planet, which also creates hot and cold air energy systems. Warm air currents typically bring rain, because they form over oceans.