AIR PRESSURE What caused this tank car to crush? 1.

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Presentation transcript:

AIR PRESSURE What caused this tank car to crush? 1

AIR PRESSURE AIR PRESSURE AIR PRESSURE AIR PRESSURE 2

Air pressure pushes mercury up! MEASURING PRESSURE Air pressure is measured by a barometer AIR PRESSURE AIR PRESSURE Air pressure pushes mercury up! 3

Measuring Pressure Air pressure is measured in three different scales… Atmosphere (atm) Millibars (mb) Inches mercury (in hg) 1 atm= _____mb 1 atm= _____in Hg 4

Weather Map…Without Data! Weather Map…With Pressure Data! 5

6 ISOBARS- lines connecting equal pressure Find the LOWEST pressures… Draw an isobar

7 H L Label the high pressure area with H Label the low pressure area with L H L

Where in the US is the air pressure high? Where is the air pressure low?

Drawing ISOBARS Find the Highest pressures… Draw an isobar

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