Between 0.2 percent and 4 percent of the air is made of water vapor. The amount of water in the atmosphere is regulated by temperature.
What is water vapor?
Water vapor is a type of gas that is formed when water vaporizes. This means that it turns into a liquid and then a gas. Water vapor is essential for the Earth’s climate because it helps to create clouds. It consists of hydrogen and oxygen atoms and is also made up of a tiny amount of water molecules.
Where does water vapor come from?
Water vapor comes from the Earth’s surface. It is created by the evaporation of liquid water as well as by the sublimation of ice. Water vapor is transparent and is continuously produced by evaporation and eliminated by condensation in a normal atmosphere. The heat of the sun and humidity levels add water vapor to the atmosphere. When the water vapor in the clouds condenses, it falls back to Earth as rain, snow, or hail.