Atmospheric Layers:
1) Troposphere- layer in which we all live and all weather phenomena occurs.
At equator: sea level to about 12 miles high(x1.6)=19.2 km
At poles: sea level to about 5 miles high (x1.6)=8 km.
Tropopause- upper boundary of the troposphere found around 7 miles (11.2 km)up.
2) Stratosphere- second layer of atmosphere where temperature rises due to the ozone
layer.
Stratopause- upper boundary of the stratosphere found about 30 miles up (48 km) up.
3) Mesophere- 3rd layer which is the last layer where air is thick enough to support life. Temperature begins
to fall again.
Mesopause- upper boundary of mesophere found at about 54 miles (86.4 km) up.
4) Thermosphere- layer about 170 miles (272 km) high where temperature rises again
because atmospheric molecules scatter, move very fast and absorb radiation.
A) Ionosphere- layer about 250 miles (400Km) high and is a region where atmospheric
molecules are electrically charged. It is the first line of defense against the sun's radiation.
B)Exosphere- highest layer of the thermosphere that extends from 350 miles (560Km)
above he surface for thousands of kilometers.