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Lesson 4

Lesson 4 . Do Gases Have Density?. Concepts. Gases have mass and volume. A vacuum is space without matter. Objectives. Observe that air takes up space. Determine the approximate density of air. Notes. The term gas refers to substances in vapor form. (not gasoline).

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Lesson 4

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  1. Lesson 4 Do Gases Have Density?

  2. Concepts Gases have mass and volume A vacuum is space without matter Objectives Observe that air takes up space Determine the approximate density of air

  3. Notes The term gas refers to substances in vapor form. (not gasoline) Air does not have a negative mass or negative weight Objects that float in air do not defy gravity

  4. Air pressure and gas pressure are not the same as density However There is a relationship Air under high pressure is more dense than air under low pressure Because

  5. Under high pressure the particles are closer together, and are therefore more dense Air is approximately 1000 times less dense than liquids or solids The density of air is about 0.0012 g/mL

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