1. What does the term “gradient” mean?

A. a decrease or increase in the size of a physical property

B. slowing down

C. speeding up

D. a decrease in the time spent making something happen

2. At what depth in the ocean near the tropics is the water temperature the warmest?

A. at the surface

B. 100 meters below the surface

C. 500 meters below the surface

D. 1,000 meters below the surface

3. Which of the following is a unit of measurement of volume flow rate?

A. liters

B. hours

C. liters times hours

D. liters divided by hours

4. Which of the following would create the greatest temperature gradient? Water with a temperature of 25 °C collected at the surface and:

A. water at a depth of 200 meters with a temperature of 10 °C.

B. water at a depth of 250 meters with a temperature of 12 °C.

C. water at a depth of 300 meters with a temperature of 8 °C.

D. water at a depth of 350 meters with a temperature of 11 °C.

5. About what depth does sunlight from the surface of the ocean generally penetrate?

A. 10 meters

B. 20 meters

C. 50 meters

D. 200 meters

6. Which of the following would produce the greatest amount of fresh water from a desalination plant similar to the one in the simulation?

A. warm water intake = 25 °C; cold water intake = 25 °C

B. warm water intake = 25 °C; cold water intake = 20 °C

C. warm water intake = 25 °C; cold water intake = 15 °C

D. warm water intake = 25 °C; cold water intake = 10 °C

7. Which of the following would not likely produce any fresh water from a desalination plant similar to the one in the simulation?

A. warm water intake = 25 °C; cold water intake = 25 °C

B. warm water intake = 25 °C; cold water intake = 20 °C

C. warm water intake = 25 °C; cold water intake = 15 °C

D. warm water intake = 25 °C; cold water intake = 10 °C

8. What is the relationship between ocean water temperature and increasing depth for the first 500 meters of ocean water?

A. direct

B. inverse

C. no relationship