Question

give reason- air expands on heating?​

Answer 1

Answer:

Air expands on heating because the particles of air on becoming warm, move away from each other and take up more space. ... The hot air occupies more space than cold air. The hot air is less dense than the cold air. The warm air rises up and the cold air remains settled at the bottom.

Answer 2

Answer:

As the molecules heat and move faster, they are moving apart. So air, like most other substances, expands when heated and contracts when cooled. Because there is more space between the molecules, the air is less dense than the surrounding matter and the hot air floats upward.