What is called Atmospheric Pressure?
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It is the pressure within the atmosphere of Earth
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Explanation:
Atmospheric pressure is the pressure exerted by the atmosphere, or rather the weight of air above a point on Earth. It can be measured using a barometer. The unit of pressure is Pascals. (pascal = Newton per square metre)
As we going to a higher altitude on Earth, the wight of air above it decreases, so the pressure will also be lesser. So atmospheric pressure decreases with increasing elevation.
Standard atmosphere (atm) is 101,325 Pa which is equivalent to the mean sea-level atmospheric pressure on Earth. Meaning the Earth's atmospheric pressure at sea level is approximately 1 atm.
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