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Layers of the Atmosphere
Troposphere
Stratosphere
Mesosphere
Thermosphere
Types of Clouds
Cirrus
Cumulus
Stratus
Storms
Thunderstorms
Tornadoes
Hurricanes
Winter Storms
The mesosphere is the the third layers out of the four, it stretches from 50km to 80km. "meso" means middle, which this layer is.
Layers Game
From NASA Marshall Space Flight Center on flickr