GEOG 2050 Chapter : Geography Jan 28 2013
Document Summary
Atmospheric composition, temperature, and function (see stratospheric leaps 1st part of ch. 3) The temperature defines which layer you are in. Air pressure: -earth"s atmosphere (atm) exerts its weight, pressing downward due to gravity. Air has pressure: air molecules create air pressure through motion, size and number. Pressure is exerted on all surfaces in contact with air: the weight or force of the atm, or air pressure pushes in on all of us. Because we have air pressure inside of us that is exerting out: the further away from the ground we are, the less amount of air molecules exist-less air pressure at high atmosphere. ), or 29. 92 inches of mercury (hg)-measured by barometer (commit to memory-you will need to know this number for future) Atmospheric composition: the atmosphere is divided into 2 broad regions, the heterosphere and homosphere, homosphere, exist from the surface to 80 km altitude, gases are well mixed here. The ozone layer is located from 19 to.
