Changes in the states of matter can occur through evaporation or condensation. Evaporation is the change of a liquid to a gas state, such as water turning to water vapor, after being heated. Condensation is the opposite change where a gas turns to a liquid state, like water vapor condensing to liquid water again, through the process of cooling.

1. Changes in the states of matter

2. Evaporation
• The change of liquid state to gas state after
heating.
Water changes to water vapor by heating.

3. Condensation
• The change of gas state to liquid state by
cooling.

4. Liquid Gas
Evaporation (heating)
Condensation (cooling)