A cloud is a mass of visible frozen droplets of vapor (in this case water) that lies in the lower atmosphere of the Earth. A cloud is a by-product of the Water Cycle being how the water condenses. The sun heats the water until it evaporates. When the water freezes in the air it forms a cloud. When the cloud becomes too heavy to stay high, the water falls in the form of precipitation, such as rain.
Cloud classifications are classified by shape, height, and altitude. The following system was created in 1802 by Luke Howard from the Askesian Society.
High clouds have a base of about 20,000 feet. They include:
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