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Layers of the Atmosphere
Troposphere
Stratosphere
Mesosphere
Thermosphere
Types of Clouds
Cirrus
Cumulus
Stratus
Storms
Thunderstorms
Tornadoes
Hurricanes
Winter Storms
Cloud Game
Stratus clouds forms in flat layers that cover almost the whole sky and are a dull gray color. Nimbostratus clouds usually produce rain or snow
From Gary Hayes on flickr