Atmosphere

What makes up our atmosphere?  Nitrogen  Oxygen  Argon

Nitrogen Cycle

Atmospheric Pressure  There is less air at higher altitudes.  Force of 10 Newtons at Sea Level

Atmospheric Pressure  As altitude INCREASES  Air Pressure DECREASES DECREASES

Temperature  Varies with increase in altitude  Why?  Solar energy absorption varies as it moves down through the atmosphere.

Troposphere  Layer closest to the Earth –Almost all water vapor and CO 2  Temperature DECREASES  Tropopause is the upper boundary –It varies with latitude

Stratosphere  From tropopause to 50 km –Contains almost all ozone  Temperature INCREASES  Stratopause is the upper boundary

Mesosphere  From km –Coldest layer  Temperature DECREASES  Mesopause is the upper boundary

Thermosphere  N and O absorb solar energy  Temperature INCREASES  2 Layers –Ionosphere- lower region –Exosphere- upper region

Tropopause Stratopause Mesopause Exosphere Troposphere Stratosphere Mesosphere Thermosphere Ionosphere