The amount of pressure the atmosphere has varies from location to location. The internationally accepted standard atmospheric pressure is approximately 14.696 pounds per square inch (psi). This pressure is that which is measured for the altitude and location of Paris, France and is used in relevance.
air has mass
with a hand pump
Air pressure
As the amount of air above us decreases...the air pressure decreases.
Air pressure
Barometer. Air Pressure is measured in pounds per square inch. A Baromerter measure air pressure.
air pressure
Air exerts pressure in the same way that water exerts pressure on a diver. Air has weight, and because we are at the bottom of a blanket of air that surrounds the earth, the weight of that air is pressing down on us (creating pressure). If you go under water, you'll feel the additional pressure created by the weight of the water above you.
The force put on a given area by the weight of the air above it is called atmospheric pressure.
The air in the atmosphere presses on us due to the force of gravity pulling the air molecules towards the Earth's surface. This creates atmospheric pressure, which is the weight of the air above us pressing down on our bodies.
The pressure decreases as altitude increases due to the decrease in air density. Air pressure is caused by the weight of the air above us, so at higher altitudes where there is less air above, there is less pressure. In contrast, at lower altitudes like in valleys or near the sea, there is more air above, leading to higher pressure.
The air pressure inside our bodies balances the external air pressure, preventing us from being crushed. Our bodies are also designed to adapt to changes in pressure, allowing us to withstand variations in atmospheric pressure without harm. Additionally, the human body is mostly made up of water and solids, which are not easily compressible.