Troposphere: Only layer to support life, Densest layer, All weather occurs here, Stratosphere: 2nd layer from Earth, Ozone layer found here, Jet Planes fly here, Mesosphere: Middle layer, Meteors burn up in this layer, Thermosphere: 4th layer from earth, Aurora Borealis (Northern Lights) occur here, Exosphere: Outermost layer of atmosphere, Communication satellites orbit here, Least dense of all layers, ISS (International Space Station) orbits here,

Layers of the Atmosphere

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