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The air always has some water mixed with it. This is called [[humidity]]. When it cools, the water can change from a [[gas]] to a [[liquid]] through [[condensation]]. Then the water can fall from the sky as [[rain]] or [[snow]]. After the air rises, it gets colder and goes back towards the ground. Because the air lost its water before, it is dry when it comes back to the ground. When two [[air mass]]<nowiki/>es of different [[temperature]]s meet, this is called a [[warm front]] or [[cold front]]. The ways that the air moves around the Earth are called [[atmospheric circulation]]. | The air always has some water mixed with it. This is called [[humidity]]. When it cools, the water can change from a [[gas]] to a [[liquid]] through [[condensation]]. Then the water can fall from the sky as [[rain]] or [[snow]]. After the air rises, it gets colder and goes back towards the ground. Because the air lost its water before, it is dry when it comes back to the ground. When two [[air mass]]<nowiki/>es of different [[temperature]]s meet, this is called a [[warm front]] or [[cold front]]. The ways that the air moves around the Earth are called [[atmospheric circulation]]. | ||
== | == External links == | ||
{{Source| | {{Source|Wiki|S}} | ||
{{commonscat}} | {{commonscat}} | ||
* [http://www.storm247.com Weather] | * [http://www.storm247.com Weather] | ||