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Exploring Air and Air Pressure in the Atmosphere

Learn the components of air, how air pressure changes, and the effects on weather. Understand the forces that create air pressure and how it influences our environment. Discover isobars and their role in predicting weather patterns.

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Exploring Air and Air Pressure in the Atmosphere

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  1. 3 February 2012 OBJECTIVE: Identify the components of air and understand how air pressure changes. • INTRO: • Hand-in Missing Assignments • Write Q&A in notebook: • Have your ears ever popped? • What were you doing that made them pop? • What do you think causes your ears to pop?

  2. Air and Air Pressure

  3. Air and Air Pressure • Atmosphere • Air • Made of air which is made of different gases • 78% = nitrogen • 21% = oxygen • 1% = carbon dioxide, water vapor and other rare gases • Pulled down by gravity which creates air pressure

  4. Air and Air Pressure • Air pressure • The measure of force air molecules push on a surface • As air molecules are pulled down by gravity, they collide and become squeezed together, that force is air pressure. Air Pressure Demo

  5. Air and Air Pressure • High air pressure • Low air pressure • Clear skies • More Sun • Less wind • Drier weather • Clouds • Less Sun • More wind • Possibly precipitation

  6. Air and Air Pressure • isobar • Line drawn on a weather map that connects points of equal pressure Adobe: Airflow

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