The process by which water vapor turns into liquid water is called condensation. This occurs when water vapor in the air cools down and loses energy, leading the molecules to slow down and group together, forming liquid droplets. Condensation is a crucial part of the water cycle, responsible for the formation of clouds, dew, and precipitation. It can occur at various temperatures and is influenced by humidity levels in the air. For example, when warm, moist air rises and cools, condensation leads to the creation of clouds, which eventually can result in rain or snow as the droplets merge and fall back to the ground.