Question

warm air is lighter than than the cold air. (Give a scientific reason)​

Answer 1

Answer:

Warm air is lighter than cold air. The reason for this is when air gets heated up it expands and becomes less dense than the air surrounding it, also the distance between the molecules increases. So the less dense air floats above the more dense cold air.

Answer 2

Answer:

I think, In warm air intermolecular spaces between molecules is increases. Thus, it's dentist become less. Therefore warm air is lighter than that of cold air.