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Clouds are made up of tiny water droplets or ice crystals, usually a mixture of both. The water and ice scatter all light, making clouds appear white. If the clouds get thick enough or high enough all the light above does not make it through, hence the gray or dark look.
The cloudâs essential component, water, can be found in all three states; in addition to droplets of liquid water, clouds contain water in its gaseous form, called water vapor, and in cold weather, they can become frozen into solids. [2] How Do Clouds Form? Clouds are a combination of water droplets and condensation nuclei. Clouds are formed when evaporation pulls water into the air creating the gaseous form of water called water vapor. When the air becomes saturated, water vapor condenses into liquid water droplets. However, it takes more than gaseous water vapor and liquid water droplets to form a cloud. These water droplets require condensation nuclei to condense upon such as dust, pollen, or smoke.