If you hold a piece of ice in your hand, it soon melts. At the same time, your hand becomes cold. In terms of energy transfer, explain why your hand becomes cold at the same time as the ice melts. 

Name any three liquids.

Name any three gases. 

How many atoms are present in a molecule of water? 

_____ are fluids.

Interconversion of state can be brought about by 

The interconversion of a liquid to its gaseous state takes place through the process of _____.