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Air pressure

TermDefinition
density the degree of compactness of a substance.
pressur the continuous physical force exerted on or against an object by something in contact with it.
air pressure Atmospheric pressure, sometimes also called barometric pressure, is the pressure exerted by the weight of air in the atmosphere of Earth or that of another planet.
mercury barometer a barometer in which the weight of a column of mercury in a glass tube with a sealed top is balanced against that of the atmosphere pressing on an exposed cistern of mercury at the base of the mercury column,
aneroid barometer a device for measuring atmospheric pressure without the use of fluids. It consists of a partially evacuated metal chamber, the thin corrugated lid of which is displaced by variations in the external air pressure.
altitude the height of an object or point in relation to sea level or ground level.
barometer an instrument measuring atmospheric pressure, used especially in forecasting the weather and determining altitude.
Created by: victoria.
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