Question

Which condition causes changes in air pressure in the atmosphere?

Answer 1

Pressure with Height: pressuredecreases with increasing altitude. The pressure at any level in theatmosphere may be interpreted as the total weight of the air above a unit area at any elevation. At higher elevations, there are fewer airmolecules above a given surface than a similar surface at lower levels

Answer 2

Low Pressure. Zones of low pressure happen when a mass of air is rising, as when ground warmed by the sun heats up the overlying surface air and causes it to rise through convection. As the airrises higher in the atmosphere it expands because of decreasing surrounding pressure and cools