1. Copper in the compound CuSO₄ can be isolated in the following reaction with iron.

Fe + CuSO₄ FeSO₄ + Cu

What type of reaction is this?

O   a. decomposition
O   b. synthesis
O   c. single displacement
O   d. double displacement

2. According to Charles' Law, what will happen to the piston when the gas is heated?

O   a. The piston will move up because the gas particles get larger.
O   b. There will be no change because heat will not affect the system.
O   c. The piston will move up because the gas particles move faster and get farther apart.
O   d. The piston will move down because the gas particles move slower and get closer together.

3. A balanced chemical equation is shown below.

C₅H₁₂ + 8O₂ 5CO₂ + 6H₂O

If 3 moles of C₅H₁₂ are reacted completely, how many moles of water are formed?

O   a. 18
O   b. 12
O   c. 6
O   d. 3

4. The cylinder is fitted with a moveable piston that can be raised and lowered. Which of the following would result in an increase in the pressure of the bas below the piston?

O   a. increasing the volume of the cylinder
O   b. removing some of the gas from the cylinder
O   c. decreasing the volume of the cylinder
O   d. decreasing the pressure outside the cylinder

O   a. brightness
O   b. distance
O   c. radiation
O   d. time

6. During droughts, lack of rain can lead to wells drying up. This is because the drought has lowered the

O   a. water table
O   b. water trough
O   c. zone of aeration
O   d. zone of porosity

7. Which of these is the best evidence that the Earth's crust has undergone some major changes?

O   a. The location of major rivers
O   b. The amount of available water on Earth
O   c. The presence of marine fossils in mountain rock
O   d. The arrival of the vernal equinox

8. Jellyfish have rarely been fossilized because they

O   a. contain no carbon compounds
O   b. are very rare animals
O   c. are generally found in oceans
O   d. have soft bodies

9. Which of these energy sources originates from a nonrenewable resource?

O   a. solar
O   b. geothermal
O   c. fossil fuel
O   d. hydroelectric

10. What does Pangaea mean?

O   a. It is the name of an extinct volcano.
O   b. It is the French word for volcano.
O   c. It is the name of an ancient supercontinent.
O   d. It is a huge disruption of the Earth's atmospherice circulation.

This table shows the pH values of samples of substances. Use the table to answer questions 11 and 12.

11. According to the table, which of these substances is basic?

O   a. rainwater
O   b. drain cleaner
O   c. distilled water
O   d. soda water

12. According to the table, which of these substances is neither an acid or a base?

O   a. rainwater
O   b. drain cleaner
O   c. distilled water
O   d. soda water