Does air have mass?.

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Presentation transcript:

Does air have mass?

Because air has mass it also has other properties including: Density Pressure

Density Amount of mass in a given volume D=M/V

Pressure The force pushing on an area or surface Air pressure is a result of the weight of a column of air pushing down on an area Why doesn’t air pressure crush us? 1000ml = 1.2g

Tool used to measure air pressure Barometer 2 types Mercury barometer-

Aneroid barometer (without liquid)-

Air pressure measured in: millibars inches of mercury 1 inch of mercury = 33.87 mb

Altitude and the properties of air Altitude – distance above sea level As altitude increases air pressure decreases When air pressure decrease density decreases