Question

Which statement best describes air pressure at high altitudes? (Points : 3)

Answer 1

Air pressure decreases as altitude increases. this is because air pressure is caused by the gravity of earth, the gravity pulls on the air, compacting it and making a pressure.
But as we go higher, gravity decreases, causing less pull on the air resulting in less air pressure.<span />

Answer 2

In general, air pressure decreases as elevation increases because there is less atmosphere pushing down on the object. So "Air pressure decreases as altitude increases."