Question

Brainllest! Why are they called hot air balloons and not cold air balloons? Be sure to use the terms density, volume, and mass in your answer.

Answer 1

Hot air balloons have hot air inside them, which is less dense as the air around it. Thus it rises. A cold air balloon would sink because the air would be more dense than the air around it. Also, the balloon’s volume would vary in size depending on the weight of the balloon.