Define air pressure. What influences air pressure in the open atmosphere?

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Define air pressure. What influences air pressure in the open atmosphere?



Answer:

-Air Pressure - Average force exerted on a unit area by molecular collisions
-Factors Influencing Air Pressure: (If all else is equal, in the open atmosphere). :

->As altitude increases, pressure decreases 
->As amount of water vapor increases, pressure decreases 
->As temperature increases, pressure decreases 
->Pressure 
->Decreases at the surface where air is rising 
->Increases at the surface where air is subsiding

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