Condensation – Definition


The process by which water vapor undergoes a change in state from a gas to a liquid. It is the opposite physical process of evaporation.

Water Vapor (H2O)

Water in gaseous form. It is one of the most import constituents of the atmosphere. Due to its molecular content, air containing water vapor is lighter than dry air. This contributes to the reason why moist air has a tendency to rise.


The physical process by which a liquid, such as water is transformed into a gaseous state, such as water vapor. It is the opposite physical process of condensation.