Question

Why is there less air pressure at higher altitudes?

Air at higher altitudes doesn't have as much air weighing down on it from above.

Air at higher altitudes is cooler and less turbulent.

The molecules in the air lose mass and are less effected by gravity, significantly lowering their weight

The warmer, lighter air rises bringing cooler heaver air to low altitudes.

Answer 1

As ailtitudes rises air pressure drops ...... As altitude increases , the amount of gas molecules in the air decreases - so the air becomes less dense than air nearer to the sea level. So there is less air pressure at high altitudes