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Day 41

This investigation explores the concept of air pressure through the use of arrows visualization. Learn about barometers, including aneroid and mercury types, and understand how they measure air pressure. Discover the advantages and accuracy of these instruments. Complete the response sheet to deepen your understanding of air pressure and wind.

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Day 41

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  1. Day 41 Investigation 8 part 1 Air Pressure Inquiry

  2. Arrows Visualization Exercise 8.1

  3. Resources, P. 49

  4. Labels and Connection to text Visualization Exercise 8.2

  5. Resources, P. 50

  6. Resources, P. 50

  7. Reading • Starting on page 48 of your resource book read “What is Air Pressure” • Answer the “Think Questions” on page 52.

  8. Barometer • Measures air pressure • Baro- means pressure • -meter- means measure

  9. Aneroid Barometer • How does an aneroid barometer work? • As pressure changes, a spring will coil and uncoil and give us a reading in millibars • What is the advantage? • Small and compact

  10. Mercury Barometer • Long glass tube filled with mercury, placed in a dish of mercury • Force of air on the surface of mercury pushes the column of mercury up the tube • Although mercury is very toxic, what is the advantage? • Very accurate

  11. Bars Used to measure air pressure Equal to the pressure exerted by air in the atmosphere at sea level Millibar (mb) Unit used to measure atmospheric pressure 1/1000 of a bar average sea-level air pressure = 1013 mb Units

  12. Response Sheet-Air Pressure and Wind • Pull out page 47 of your lab book and answer the question.

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