Water’s the Matter

Unit 2 Temperature

Post-Test---Answer Key

  1. Which of the following water conditions would contain the greatest amount of dissolved oxygen? (Objective 1; answer B)
  1. a mountain lake in full sun
  2. a shady mountain stream
  3. a stagnant pond
  4. a slow-moving stream in summer
  5. a mountain lake at night
  1. The amount of oxygen dissolved in water is the temperature of the water. (Objective 1; answer B)
  1. directly related to
  2. inversely related to
  3. exactly the same as
  4. not influenced by
  5. the main cause of
  1. In general, an increase in the temperature of water will of aquatic organisms. (Objective 1; answer C)
  1. increase the size of
  2. decrease the need for oxygen
  3. increase the rate of growth
  4. decrease the activity
  5. have little effect upon the reproduction
  1. An inverse relationship is best described as an association of factors where: (Objective 1; answer B)
  1. an increase in one factor causes an increase in another factor.
  2. an increase in one factor causes a decrease in another factor.
  3. a decrease in one factor causes a decrease in another factor.
  4. changes in one factor does not change another factor.
  5. changes in one factor have a variety of possible effects on another factor
  1. Which of the following would decrease the temperature of a river? (Objective 2; answer D)
  1. increasing the runoff that enters the river
  2. increasing the number of fish in the river
  3. damming the river
  4. increasing the amount of shade along the river
  5. decreasing the number of plants in the river
  1. Which of the following would have the lowest temperature? (Objective 2; answer A)
  1. a mountain stream
  2. wetlands
  3. a slow moving river
  4. a lake
  5. a pond
  1. Which of the following best describes run off? (Objective 2; answer B)
  1. Run off is the amount of water that enters the ocean from a river each year.
  2. Run off is the amount of water that enters a river from streets and parking lots.
  3. Run off is the amount of water that leaves a river during a flood.
  4. Run off is the amount of water that enters a river from streams and creeks.
  5. Run off is the amount of water that enters a river from underground sources.

8.A true statement about “wetlands” would be that they . (Objective 2; answer B)

  1. rarely contain fish as they are poor in oxygen
  2. serve as a filtration system for rivers
  3. are responsible for adding large amounts of bacteria into rivers
  4. contribute significantly to run off
  5. are culprits that contribute large amounts of water to floods

9.Which of the following charts best represents the relationship between numbers of bacteria in the water and dissolved oxygen? (Objective 3; answer D)

  1. Chart 1
  2. Chart 2
  3. Chart 3
  4. Chart 4
  5. None of these
  1. Which of the following charts best represents the relationship between the number of plants living in water and the amount of dissolved oxygen present? (Objective 3; answer A)
  1. Chart 1
  2. Chart 2
  3. Chart 3
  4. Chart 4
  5. None of these

11. If the temperature is 32oC, what is the temperature in oF? (Objective 3; answer E)

  1. -32o
  2. 0o
  3. 1.8o
  4. 32o
  5. 90o

12.You are serving as a research scientist with the Environmental Protection Agency. You are monitoring the temperature of rivers in an area. You record the temperatures of the Apple River to average 12oC for the month of January. During the same month, the temperatures of the Big River average 8oC. Additionally, temperatures from the Chattanooga River average 17oC. The Durham River has an average temperature of 9oC, and the East River has an average temperature of 10oC. Of the five rivers, which is most likely receiving wastewater from the Timberland sawmill? (Objective 3; answer C)

  1. The Apple River
  2. The Big River
  3. The Chattanooga River
  4. The Durham River
  5. The East River