What happens when molicules are heated?

Answer 1

When molecules are heated they become more active. When they are cooled, the slow down.

Answer 2

When molecules are heated, their kinetic energy increases, causing them to vibrate and move more rapidly. This can lead to a change in state from solid to liquid or liquid to gas, depending on the amount of heat applied. In some cases, heating molecules can also cause chemical reactions to occur, leading to the formation of new compounds.