1. It is the lowest region of the earth's atmosphere, where we live and most weather
occur,
2. It is the only layer where jets can travel and protective ozone is found,
3.It is the coldest region of the atmosphere. It protects the earth by burning up meteors
while entering the atmosphere.
4. It is the first layer exposed to the sun's radiation and so it is the first heated by the sun.
5. It is the upper part of thermosphere . It is where jet travel.​