Question

short answer I want
short answer wanted ​

Answer 1

Answer:

Explanation:

take two paper cups and take one candle.  tie the each cups at the two ends of a stick. ensure that you kept those paper cup with some distance away from the flame of the candle. the cup with the candle below it will raise up due to the hot air.

this proves that hot air is lighter than cool air

Answer 2

Answer:

when air gets heated up it expands and becomes less dense than the air surrounding it also the distance between the molecules increases