1. Layers of the atmosphere
Air pressure DECREASES as altitude increases

2. Troposphere 0-9 miles above the surface Where weather happens
Where more than ½ the total air is
Temperature decreases (gets colder) with height
Troposphere

3. Stratosphere 9-31 miles from the surface Where most airplanes fly
Where the ozone layer is
Temperature increases (gets hotter) with height
Stratosphere

4. Mesosphere 31-55 miles from the surface Meteors burn up
Radio waves are reflected to Earth
Temperature decreases (the coldest layer)!!
Mesosphere

5. Thermosphere 55-186 miles from the surface Hottest layer
Auroras occur here
Temperature increases with altitude
Thermosphere

6. Exosphere 186-372 miles from the surface Where satellites orbit
Outermost layer
Temperature increases with height
Exosphere