Practice Problems- Unit 2A

Name

Practice Problems- Unit 2A

Behavior of Gases

1. Define the following terms:

Pressure-

Air Pressure-

Vacuum-

Temperature-

2. What is the name of the apparatus that measures air pressure? ______

3. What are some of the different units for pressure?

4. What is the name of the apparatus that measures temperature? ______

5. What are some of the different unit for temperature?

6. If you stopped someone on the street and asked them what does a thermometer measure? They might answer it measures how hot or cold something is. Using what you learned this unit how could you answer this question better?

7. What do we mean by atmospheric pressure? What causes this pressure?

8. How do we measure atmospheric pressure? Is atmospheric pressure the same everywhere on the surface of the earth?

9. What evidence have we used to come to the conclusion that particles move?

10. Draw a particle diagram of how food coloring dissipates in hot vs. cold water.

11. The pressure exerted by a gas in a container depends on______

12. The gas in the box at left has a higher temperature than the gas in the box at the right. Draw “whooshies” on the particles in each box to represent their relative motion.

13. The gas in the box at left has a higher pressure than the gas in the box at the right. Draw “whooshies” on the particles in each box to represent their relative motion.

14. How are your pictures of high vs. lower pressure and high vs. lower temperature related?

15. You decide to boil water to cook noodles. You place the pan of water on the stove and turn on the burner.

a. How does the behavior of the water molecules change as the pan of water is heated?

b. What about your answer to (a) would change if there were more water in the pan?

16. Explain why you cannot use a pump like the one at the right to lift water up to the 3rd floor of an apartment complex.

a. How is your answer above related to the demo of the long straw in the stairwell?