Download Post Reading Test

Post Reading Test
After reading Stage 2, take this quiz to see how much you retained.
1. Which is a measure of the hydrogen ion concentration of a solution?
A. specific heat
B. turbidity
C. pH
D. chemical buffer
Correct Answer: C
Feedback: The answer is C because the hydrogen ion concentration of a solution is measured with the pH
scale. To obtain more information on this topic, turn to page 25 of your Climate: Seas of Change
student edition.
2. Which is the layer of ocean water that separates the warmest top layer from the deepest, coldest
layer?
A. mixed layer
B. thermocline
C. continental slope
D. continental margin
Correct Answer: B
Feedback: The answer is B because the thermocline is the layer of water that forms the boundary between
the warmer mixed layer at the top of the ocean and the colder deep water layer. To obtain more
information on this topic, turn to page 27 of your Climate: Seas of Change student edition.
3. Which best describes the thermal expansion of water?
A. Water expands as its temperature increases, but it also expands when it freezes.
B. Water expands as its temperature decreases and contracts as its temperature increases.
C. Water expands as its temperature increases and contracts as its temperature decreases.
D. Water expands as its temperature decreases, but it contracts when it freezes.
Correct Answer: A
Feedback: The answer is A because when the temperature of water is above its freezing point, the water acts
like most other liquids and expands as its temperature increases. However, unlike most liquids,
water also expands when it freezes. To obtain more information on this topic, turn to page 28 of
your Climate: Seas of Change student edition.
4. Which of these would increase the salinity of water?
A. increasing bacteria
B. increasing silt
C. increasing potassium ions
D. increasing phytoplankton
Correct Answer: C
Feedback: The answer is C because salinity measures only dissolved materials, such as potassium ions, in a
liquid. Biological materials, such as bacteria and phytoplankton, and solids that are suspended in
the liquid, such as silt or sand, are not included in the measure of salinity. To obtain more
information on this topic, turn to page 22 of your Climate: Seas of Change student edition.
5. Which best explains why the sand on a beach gets hot much more quickly than the water just off
the shore?
A. Water has a higher specific heat capacity than sand.
B. Water has a lower specific heat capacity than sand.
C. Water has greater thermal expansion than sand.
D. Water has lower thermal expansion than sand.
Correct Answer: A
Feedback: The answer is A because specific heat is the amount of energy needed to raise the temperature of
1 g of a substance by 1 °C. Since water has a higher specific heat capacity than sand, it takes
more energy to heat water than sand. To obtain more information on this topic, turn to page 28
of your Climate: Seas of Change student edition.
6. Suppose you wanted to increase the amount of carbon dioxide that could be dissolved in a sample
of water. Which change should you make to the water?
A. Increase its temperature.
B. Increase its pressure.
C. Increase its salinity.
D. none of the above
Correct Answer: B
Feedback: The answer is B because more gases can be dissolved in water the lower its temperature and
salinity and the higher its pressure. To obtain more information on this topic, turn to page 24 of
your Climate: Seas of Change student edition.
7. How would an increase in ocean temperature in an area affect the density of the seawater in that
area?
A. The density would increase.
B. The density would decrease.
C. The density would not be affected.
D. The density would double.
Correct Answer: B
Feedback: The answer is B because the cooler seawater would be denser than the warmer seawater. To
obtain more information on this topic, turn to page 26 of your Climate: Seas of Change student
edition.
8. Assume you have seawater with the properties shown in the table. Change one property and
describe how that would affect the other properties in the table and why.
Correct Answer: Students' answers will vary; however, the effect of the change should be logical, and
students should be able to explain why the change would take place. Some examples of
changes students might make include: increasing the salinity of water, which would
increase the density and the amount of dissolves gases it could hold; increase the
temperature of the water, which would increase the volume due to thermal expansion,
decrease the density, and decrease the amount of dissolved gases it could hold.
Feedback: The properties of ocean water can be interrelated. To obtain more information on this topic, turn
to page 22-28 of your Climate: Seas of Change student edition.