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Troposphere
First layer
0-12km
17 - -55
75 to 80% mass
Turning or changing
Stratosphere
Second layer
-55. - -5’
12 - 50km
Ozone present
Lower layer is colder than upper layer
Spread out or layer
Mesosphere
Middlelayer
Protect from meteoroids
50 to 80km
-55 to -93C
Thermosphere
Sunlight hits first
Meaning heat
80 plus k-93 to 1800 C
Sunlight hits first
Ionosphere
80 to 400km
Lower layer
Exo sphere
Upper layer
400 to thousand plus km