As altitude increases, the air pressure decreases. The surface of the earth is the bottom of an ocean of air. The layers on top increase pressure so that at sea level a body is under 14.7 pounds of pressure per square in... More »

Air pressure changes with altitude because of issues related to gravity. Molecules have more weight the closer they are to the Earth and more of them move to lower elevations as a result; this causes increased pressure b... More »

Air pressure decreases with altitude. The combined weight of air molecules at increasing altitude decreases. Air pressure is greatest at the Earth's surface, because the surface air molecules bear the combined weight of ... More »

Air cools when it rises through the atmosphere because as altitude increases, air pressure decreases and allows the individual air molecules to expand away from each other. This expansion leads to a decrease in collision... More »

Atmospheric pressure decreases as altitude increases. High altitudes contain less air molecules, resulting in lower air density, decreased temperatures and lower air pressure. High altitudes are typically found above sea... More »

The atmosphere becomes less dense as altitude increases because there is less weight on the air molecules, making them less compressed. The air at lower altitudes is denser because it is pressed down by the weight of all... More »

When altitude increases, air temperature decreases. This is because, with an increase in altitude, there is a decrease in air pressure. When air pressure decreases, air cools down. More »