# earth science.

i searched google and no help. i have been stuck for hours.i have to do a packet and i cant under stand it. it says ' sea level 10 degrees = 1 atmosphere and then i have to do tropopause ,stratapause and mesopause and the rest of it says . an atmosphere is a unit of air pressure . 1 atmosphere =average air pressure at sea leve under normal comditions. 1 atmosphere = 14.7 pounds per square inch or 29.92 inches of mercury.
i don't get this at all if you can please help it will be greatly appreciated

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1. I'm not sure what you need either. These are the exact instructions? Here is something on Global Warming:

http://en.wikipedia.org/wiki/Global_warming

Definition of tropopause:

http://en.wikipedia.org/wiki/Tropopause

stratopause: http://en.wikipedia.org/wiki/Stratopause

mesopause: http://en.wikipedia.org/wiki/Mesopause

Next time you don't understand the instructions, try to ask the teacher before you go home. Also, don't wait too long when you can't find an answer before posting. When you DO post, please make the instructions as clear as you possibly can.

Sra

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2. I may be wrong but I think what you are supposed to do is to figure out the pressure at the tropopause, stratopause and mesopause.
It is 29.92" at sea level.

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