1. At what temperature will water begin to boil and turn to steam? A. 212 kelvins
B. 100 degrees Celsius
C. 212 degrees Celsius
D. 100 degrees Fahrenheit

2. What does the term "heat capacity" refer to?
A. The amount of heat energy needed to raise the temperature of a unit mass of a material one degree
B. The amount of heat that must be applied to a solid to convert it to a liquid
C. A ratio of the amount of heat a material will absorb to the amount of heat it immediately releases
D. The amount of heat that a liquid can absorb until the particles speed up enough to become a gas

3. What happens to a bar of metal when it's heated?
A. It gets shorter.
B. It gets longer.
C. The effect depends on the density of the bar.
D. It stays the same length.

4. What does Boyle's law state about the relationships among temperature, volume, and pressure?
A. When the temperature of a gas increases, the volume and pressure of the gas both decrease.
B. When the pressure of a gas decreases, the volume and the temperature of the gas both increase.
C. As the volume of a gas increases, the temperature and pressure of the gas both decrease.
D. Provided temperature remains constant, the volume and pressure of a gas are inversely related.

5.Which of the following is an example of heat transmission by convection?
A. A skillet on a very hot stove burner heats up uniformly and quickly.
B. An iron bar is placed inside a hot furnace and begins to glow orange.
C. Liquid inside a beaker on a hot Bunsen burner circulates and heats through constant motion.
D. The heat from the sun melts a snowman even though it's below freezing outside.

6. What happens at the condensation point?
A. Molecules of a gas slow down and change to a liquid state.
B. Molecules of a solid speed up and begin to turn to a liquid state.
C. Molecules of a liquid heat up and begin to convert to a gaseous state.
D. Molecules of a liquid slow down and start to convert to a solid state.

7. What does it mean for a liquid to be at its saturation point?
A. The volume of liquid is equal to the volume of vapor in a closed container.
B. The liquid has absorbed as much heat as it can until it starts to vaporize.
C. The rate of evaporation and the rate of condensation are the same.
D. The liquid has completely filled up its container, and no more can liquid can fit in.

8. The process by which energy is released is known as
A. kinesis.
B. combustion.
C. ignition.
D. conduction.

9. Which of following is the most accurate description of a piston in an internal-combustion engine?
A. A hollow metal tube drilled into the solid metal engine block
B. A can-shaped component that moves smoothly up and down and is the main moving part
C. A plug that protrudes through the cylinder head and makes sparks that ignite the air-and-fuel mixture
D. A shaft that converts the up-and-down motion into a rotary motion

10. What's the sequence of a single complete engine cycle?
A. Intake, compression, power, exhaust
B. Compression, power, intake, exhaust
C. Intake, power, compression, exhaust
D. Intake, exhaust, compression, power