The process where water vapor turns into liquid is called condensation. This occurs when water vapor in the air cools down and transitions back into its liquid form, often forming droplets. Condensation is a crucial part of the water cycle, contributing to processes such as the formation of clouds and precipitation. It commonly happens on cold surfaces, like glass or metal, when humid, warm air comes into contact with these cooler surfaces. Understanding condensation is essential in fields like meteorology, environmental science, and even everyday phenomena, such as dew forming on grass in the early morning.