2. 2) The average kinetic energy of the molecules in a substance refers to its ______.
A) heat
B) temperature
C) momentum
D) viscosity

3. 3) The sea level boiling point of water on the Fahrenheit scale is ________.
A) 100 degrees
B) 112 degrees
C) 124 degrees
D) 212 degrees

4. ) What happens when an ice cube melts in a glass of water?
A) Heat travels from the ice to the warmer water.
B) No energy is transferred.
C) Heat is transferred from the warmer water to the ice cubes.
D) The water warms up due to the heat transfer.

5. Calories are units that express measurement of _________.
A) heat
B) temperature
C) momentum
D) viscosity

6. 9) Which statement is true about a small glass and a large glass filled with water the same temperature?
A) Both glasses contain the same amount of heat.
B) The large glass has more heat than the small glass.
C) The small glass has more heat than the large glass.
D) There is no way to determine which glass has more heat.

7. 10) Suppose a 10 mL beaker and a 100 mL beaker are both filled with water, and that the water in both beakers is the same temperature. Which statement below about the water in the two beakers is true?
A) The two beakers of water contain equal amounts of heat.
B) The larger beaker of water contains more heat than the smaller beaker.
C) The smaller beaker of water contains more heat than the larger beaker.
D) It is not possible to determine which beaker of water contains the most heat because heat cannot be measured.

8. 11) Water freezes at what temperature on the Celsius scale?
A) 0 degrees
B) 10 degrees
C) 12 degrees
D) 32 degrees

9. A change of temperature occurs when the rate of molecular vibration changes. If molecules vibrate faster, what happens to the heat measured?
A) The temperature rises.
B) The temperature stays the same.
C) It gets colder.
D) It depends on the state of matter of the substance.

10. 13) When molecules in a substance vibrate faster and faster, what happens to the temperature of the substance?
A) It stays the same.
B) It gets warmer.
C) It gets colder.
D) It depends on the change in speed of the vibrations.

11. 14) How will the rising of a hot air balloon in cold air be different than if it rises in warm air?
A) It will rise faster in cooler air.
B) It will rise more slowly in cooler air.
C) There will be no difference.
D) It will sink in cool air and rise in warm air.

12. 15) Which statement below best explains why ice cubes melt when they are placed in a glass of water?
A) A chemical change occurs which causes the ice molecules to break up into hydrogen and oxygen.
B) Pressure from the water squeezes the ice cubes, making them very small.
C) Heat is transferred from the ice cubes to the water.
D) Heat is transferred from the water to the ice cubes.

13. 6) When a thermometer is placed in a substance, what is it actually measuring?
A) heat
B) temperature
C) pressure
D) density

14. 18) What happens to the molecules as water freezes?
A) The water molecules stop moving.
B) The water molecules move faster.
C) The water molecules slow down.
D) The water molecules react chemically to form ice molecules.