The pressure decreases as the elevation increases because?

Question

A. The air has a lower density at a higher elevation

B. The Earth exerts a strong gravitational force

C. The air is colder at a higher elevation

D. None of the above

Answer 1

The answer is (D) ;as the pressure at a particular level is the weight of the overlying air column above that level and the length of this air column decreases as you go up

Answer 2

A The air has a lower density at a higher elevation

The reason is because there is less air above it pushing down so there is less compression.

Answer 3

D, none of the above.  The pressure is essentially the weight of the air above you. The higher you go, the less air that is above you, so the pressure goes down.