Condensation:
Condensation is the process of a gas changing to a liquid. Condensation is an important part of the water cycle, as it enables evaporated water (water vapor) to condense, and return to earth as precipitation. Condensation occurs when temperature of the gas decreases or the pressure increases. It is the opposite of evaporation, which is the process in which a liquid changes to a gas. For further info click here:
USGS Water Cycle