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Atmospheric pressure is caused by the force of the air above the earths surface. It is measured by the point in which the air meets the atmosphere.
The atmosphere pressure is commonly measured using a device called a barometer. This instrument detects the weight of the air above it, which decreases as altitude increases. The most common unit of measurement for atmosphere pressure is the bar or millibar.
Yes, the atmosphere exerts pressure on us due to the weight of the air above us. This pressure is known as atmospheric pressure and can be felt as we move higher or lower in elevation.
The atmospheric pressure on the moon is essentially zero because the moon does not have a significant atmosphere. Unlike Earth, which has a dense atmosphere that exerts pressure due to the weight of the air above us, the moon lacks this gaseous envelope and thus has almost no atmospheric pressure.
Atmospheric pressure is caused by the weight of the air above us pressing down on the Earth's surface. The pressure decreases with altitude as there is less air pressing down. It is a result of gravity pulling the air molecules towards the Earth.