Density and Air Pressure Density and Air Pressure DemonstrationsDemonstrations

Demonstration 1 (pg. 7): Demonstration 1 (pg. 7): The air is made up of:The air is made up of:

78% Nitrogen 78% Nitrogen21% Oxygen21% Oxygen

1% Other Gases1% Other Gases

Experiment 2 (pg. 9): Experiment 2 (pg. 9): The atmosphere is constantly The atmosphere is constantly changing, with gases moving changing, with gases moving in and out of living things, the in and out of living things, the

land, and waterland, and water

Demonstration 3 (pg. 11): Demonstration 3 (pg. 11): Air Has MassAir Has Mass

Experiment 4 (pg. 11): Experiment 4 (pg. 11): Density = mass/volumeDensity = mass/volume

Demonstration 5 (pg. 11): Demonstration 5 (pg. 11): Air Pressure pushes on Air Pressure pushes on objects in all directions. objects in all directions.

Including up!Including up!

Experiment 6 (pg. 11): Experiment 6 (pg. 11): Air pressure increases as Air pressure increases as

density increasesdensity increases

Demonstration 7 (not in the Demonstration 7 (not in the book, but a fact you need to book, but a fact you need to

know): know): Air is a FluidAir is a Fluid

Demonstration 8: Demonstration 8: Air Pressure increases as Air Pressure increases as

temperature increasestemperature increases

Demonstration 9: Demonstration 9: Air molecules expand as Air molecules expand as

temperature increases. As temperature increases. As temperature increases temperature increases

density decreases.density decreases.