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Atmosphere

by Sadie Tyler

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Atmosphere
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By Sadie Tyler
GLOSSARY
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.description of system
.location
.how it helps life on Earth
.how humans impact the system
.a minimum of 5 words for the glossary
Fun Fact 
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Earth's atmosphere is composed of about 78% nitrogen, 21% oxygen, and one percent other gases. 
The sun heats layers of the atmosphere causing it to convect driving air movement and weather patterns around the world
The Amount of gas and liquids
An atmosphere is a layer of gas or layers of gases that envelope a planet, and is held in place by the gravity of the planetary body.
Earth's atmosphere is composed of about 78 percent nitrogen, 21 percent oxygen, 0.9 percent argon, and 0.1 percent other gases.
The evolution of Earths current atmosphere is not completely understood. It is thought that the current atmosphere resulted from a gradual release of gases both from the planet’s interior and from the metabolic activities of life-forms—as opposed to the primordial atmosphere, which developed by outgassing (venting) during the original formation of the planet. 
Water Budget
The water budget at the air-surface interface is also of crucial importance in influencing atmospheric processes. The surface gains water through precipitation (rain and snow), direct condensate, and deposintation (dew and frost). On land, the precipitation is often so large that some of it infiltrates into the ground or runs off into streams, rivers, lakes, and the oceans. Some of the precipitation remaining on the surface, such as in puddles or on vegetation, immediately evaporates back into the atmosphere.
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