Geography, asked by vartaman49, 11 months ago

Why does air pressure decrease with altitude?

Answers

Answered by pkparmeetkaur
4
hey mate here is your answer :-

The pressure is indeed related to the temperature but that's not the reason for the pressure to be high low to the ground and lower at higher altitudes.  It's rather the other way around: temperature is higher low to the ground and it gets colder the higher you go thanks to adiabatic (ideal) gas laws.
Anything with a weight is under the influence of earth's gravity.  Gas - though it may be very light in our opinion - is of course not escaping the law of gravity.
The gasses that make up the air lower down feel the weight of the gasses that are piled up on top.  Like any "fluid", they are therefore compressed and subject to increased pressure, depending on "depth", density and the gravity's acceleration vector (g). 
Because of this higher pressure, the temperature is also higher when you get closer to our planet's surface, due to adiabatic heating according to the gas equation.
Temperature in our atmosphere is not all that simple though, at a certain altitude it increases again, then goes down again, then increases again.


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