Tuesday, February 9, 2010

Unit Review-Atmosphere and Weather

Layers: based on temperature change, chemical composition, and density
Troposphere:
-Bottom layer; we live here
-Weather occurs here (air thins with height because gases decrease)
-Temperature decreases with altitude
Stratosphere:
-Very dry;little to no water vapor
-Ozone and jet streams here
-Temperature increases because of Ozone's absorption of sun's UV rays
Mesosphere:
-Temperature decreases (down to -130 degrees F)
-Air pressure is very low
Thermosphere:
-Warmest layer (high energy from UV radiation)
-Aurora's occur here
Exosphere:
-Very tip of atmosphere before space.

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