The process by which water vapor changes into liquid is called condensation. This occurs when water vapor in the air cools down and loses energy, causing the water molecules to come together to form liquid droplets. Condensation is a crucial part of the water cycle, contributing to cloud formation and precipitation. It can be observed in everyday life, such as when dew forms on grass in the early morning or when steam from a hot shower condenses on cold bathroom mirrors. Understanding condensation is important for various scientific fields, including meteorology and environmental science.