Atmosphere Pressure

Atmospheric pressure is the force exerted by the weight of the air molecules in the Earth's atmosphere on a given area. It arises because air molecules constantly move and collide with surfaces, creating pressure. This pressure decreases with altitude, as there are fewer air molecules higher up. It influences weather, breathing, and a swimmer's experience underwater. Standard atmospheric pressure at sea level is about 1013 millibars or 14.7 pounds per square inch. Understanding atmospheric pressure helps explain phenomena like wind, weather systems, and why we feel different pressures at various elevations.