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Air Pressure

Air Pressure

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Air Pressure

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Presentation Transcript

  1. Air Pressure • Just how does it work?

  2. Things that effect Air Pressure • Altitude (Elevation) • Temperature • Humidity (moisture in the air)

  3. Altitude • The higher the altitude, the lower the air pressure. • The lower the altitude, the higher the air pressure.

  4. Temperature • As the temperature goes up, the air pressure goes down. (hot molecules are further apart- less pressure). • As the temperature goes down, the air pressure goes up. ( cold air is more dense than warm air).

  5. Humidity • Humidity is the amount of moisture in the air. • Water vapor weighs less than air molecules. • As the air becomes more humid, the air pressure goes down (moist air weighs less than dry air). • Drier air has higher pressure because dry air weighs more than moist air, therefore it has greater pressure.