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Science, Other
7th
grade
Human Impact on Water: Unit 8, Lesson- Retake
10 questions
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- 1. Multiple Choice
Pesticides, herbicides, and fertilizers are chemicals used in agriculture. How do they affect the water supply?
By coming down as acid rain.
Because metals and plastic produce toxic waste
By seeping into groundwater.
- 2. Multiple Choice
Which of these statements is true of acid rain?
It comes from metal or plastic products.
It makes soil and water too acidic for life.
It contains microbes that cause disease.
- 3. Multiple Choice
A factory is built on the bank of the Mississippi River. Water is used in the factory to make a product. The water is heated and then piped back into the river. What is this form of pollution called?
Chemical pollution
Biological pollution
Thermal pollution
- 4. Multiple Choice
With thermal pollution, the warm water that is returned to a river or lake has less ____________ for organisms that live in the water.
oxygen
carbon dioxide
hydrogen
- 5. Multiple Choice
Humans can cause different types of pollution. When live or dead organisms make their way into water systems, which type of pollution has taken place?
chemical pollution
thermal pollution
biological pollution
- 6. Multiple Choice
pH is one of the measurements of water quality. Read the table above the bar graph first. Next, look at the bar graph that shows the pH values of several substances. Which substance is the strongest acid?
bleach
milk
lemon juice
- 7. Multiple Choice
Which of these statements is true about non-point source water pollution?
comes from one specific site
comes from many small sources that is more difficult to control
is always thermal pollution.
- 8. Multiple Choice
This would be an example of...
point source pollution
non-point source pollution
acid rain
- 9. Multiple Choice
Which of these 3 choices is not a threat to our water supply?
conservation
demand
drought
- 10. Multiple Choice
The movement of colored water through the gravel best models-
condensation of water vapor
pollution of groundwater
conservation of water
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