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- 1. Multiple Choice
1. What is turbidity?
The acidity of the water.
The amount of heat in the water.
The amount of oxygen in the water.
The clearness or cloudiness of the water.
- 2. Multiple Choice
2. What is Dissolved Oxygen?
The amount of oxygen in the water.
The clearness or cloudiness of the water.
The amount of heat in the water.
The acidity of the water.
- 3. Multiple Choice
True or False- High levels of dissolved oxygen indicate or show a healthy water supply.
True
False
- 4. Multiple Choice
What is the healthy pH level for potable water?
2
7
14
5
- 5. Multiple Choice
How are watersheds and river basins related?
Many river basins flow into a watershed.
Watersheds and river basins do not relate.
Many watersheds flow into a river basin.
Watersheds are the same as river basins.
- 6. Multiple Choice
If there is a large number of living organisms in and around a water supply, then could the water supply be considered healthy?
No, because it contains nitrates.
No, because it contains living organisms.
Yes, because it contains bioindicators, which are used to assess the health of a water supply.
Yes, because it contains nitrates, which are used to assess the health of a water supply.
- 7. Multiple Choice
Which of the following is the best example of a source of POINT POLLUTION?
Pet owners leaving waste on the ground.
Runoff from farms that brings animal waste into a stream.
Home owners washing cars near a storm drain.
A fabric company that pours extra dye into a nearby stream
- 8. Multiple Choice
What factors directly lead to unhealthy levels of nitrates in the water? (Select all that apply)
Fertilizer Runoff
Animal Waste Runoff
Loose soil
Acid rain
- 9. Multiple Choice
How does temperature relate to dissolved oxygen levels?
Lower temperatures leads to higher levels of dissolved oxygen.
Lower temperatures leads to lower levels of dissolved oxygen.
Higher temperatures leads to higher levels of dissolved oxygen.
Temperature and dissolved oxygen do not relate.
- 10. Multiple Choice
Which of the following statements best explains why nonpoint pollution is so difficult to prevent?
Because nonpoint pollution can be traced to only one source.
Because the source of nonpoint pollution is difficult to identify.
Because the source of nonpoint pollution may be a factory that can afford large fines.
Because nonpoint pollution is mainly from high temperature, which is impossible for us to affect.
- 11. Multiple Choice
How is pH level influenced by nitrates?
If the pH level is too high, then the nitrates become acidic.
If the pH level is too high, then the nitrates disappear from the water supply.
If the nitrate levels are too high, then algae grows, which leads to unhealthy pH levels.
If the nitrate levels are too low, then algae disappears, which leads to unhealthy pH levels.
- 12. Multiple Choice
Below is a chart of test results from water samples taken at various sites. Which of the following best describes the results from these sites?
Site 1 is unhealthy because of its dissolved oxygen levels are too high.
Site 3 and 4 are unhealthy because the temperature is too low.
Site 2 is unhealthy because the pH is too high and the temperature is too low.
Site 5 is unhealthy because the temperature is too high and the dissolved oxygen is too low.
- 13. Multiple Choice
Which of the following best describes the causes of the results from these sites?
The pH of site 1 is not within the healthy range.
The pH of site 2 is most likely the cause of the temperature results.
The pH of site 3 and 4 is most likely the cause of the temperature results.
The temperature of site 5 is most likely the cause of the dissolved oxygen results.
- 14. Multiple Choice
Which of the following can be concluded based on the data?
Sites 5 through 8 are most healthy because they have a high % of bioindicators.
Sites 1 and 13 are most concerning because they have low % of bioindicators.
Sites 5 through 8 are most concerning because they have a high % of bioindicators.
Site 12 is most healthy because it has the lowest % of bioindicators.
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