layers
weather
100

what's the lowest layer where weather happens

troposphere

100

the differences in weight and pressure of air masses  

air pressure 
200

whats the second layer of the atmosphere

stratosphere

300

whats the third layer where mentors burn up

mesosphere 

400

whats a high temperature layer that absorbs x rays and holds the internation space station  

thermosphere 

500

whats the outer edge where the atmosphere thins out into space 

exosphere