The process of heating a liquid to form vapor and then cooling it to form a liquid is called condensation. This involves evaporation of the liquid to create vapor, followed by cooling to allow the vapor to return to the liquid state. This process is essential in various natural and industrial contexts, such as the water cycle where water evaporates from surfaces, forms clouds, and then condenses to fall as precipitation. Condensation is important for energy conservation and is utilized in techniques like distillation to separate substances based on boiling points.