Layers of the atmosphere Air pressure DECREASES as altitude increases

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

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

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

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

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