What happens to the pressure of air as you ascend in elevation?

As you ascend in elevation, the pressure of air decreases. This phenomenon is primarily due to the fact that air is less dense at higher altitudes. At sea level, the weight of the air above us contributes to a higher atmospheric pressure. As you go higher, there is less air above you, which means there is less weight exerting pressure, resulting in a decrease in atmospheric pressure.

Additionally, the absence of a significant amount of air at higher elevations means that there are fewer air molecules to contribute to the overall pressure. This leads to the general rule in atmospheric science that the pressure drops as elevation increases. Understanding this concept is crucial, especially in fields like meteorology, aviation, and mountain climbing, where pressure changes can significantly impact weather patterns, aircraft performance, and human physiology.