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Clouds

Page history last edited by Karla Vega 9 years, 8 months ago

Clouds    

 

      A cloud is a mass of water droplets or ice crystals that floats in the air. When warm air rises and cools, the water vapor in air condenses and forms water droplets. These droplets form clouds. There are 3 main types of clouds. They are cirrus, cumulus, and stratus. These types of clouds may combine to form many other kinds of clouds. You can study clouds to find out how the weather will change.

 

 

 

     Cirrus clouds are white and feathery. They form high in the sky. It is so cold in this part of the atmosphere that cirrus clouds are made entirely of ice crystals. Cirrus clouds usually mean that rain or snow is coming within a day.

 

     

Cumulus clouds are thick, white, and fluffy. They look like piles of cotton. You can often see cumulus clouds on a sunny summer day. They mean fair weather. Cimulus clouds form much lower in the atmosphere than cirrus clouds and are made only of water droplets.

 

 

     

     Stratus clouds are layers of gray clouds that cover most of the sky. They often mean that rain or snow is coming. Stratus clouds form low in the atmosphere. A stratus cloud that forms on the ground is called fog. Fog forms when air that is holding a lot of water cools off quicly at night.

 

 

     Sometimes the term nimbus is added to the name of a cloud. Nimbus means that a cloud is heavy and dark and will bring rain. Cumulonimbus clouds, for example, produce summer thunderstorms.    

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