Unit Test — Test Answers

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1
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Which is a nonpoint source of pollution?

A
Tourists throw trash into the ocean.
B
A car mechanic pours oil on the ground.
C
Rain contains chemicals that seep into the ground.
D
A pipe dumps waste from a factory into a stream.
2
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Which term refers to the process by which land is worn away by natural forces or human activity?

A
erosion
B
desertification
C
urbanization
D
deforestation
3

Which statement provides the best argument against making major changes to the atmosphere to help protect Earth’s resources?

A
There will be less soil and dust in the air as construction increases.
B
The atmosphere will improve as more people move to large cities.
C
Making major changes to the atmosphere can be a costly process.
D
It is more important to protect land and water resources than the atmosphere.
4

What process leads to deforestation and increased erosion?

A
mining
B
reforestation
C
desertification
D
urbanization
5

Which correctly lists three main causes of deforestation?

A
air pollution, mining, logging
B
mining, cattle ranching, logging
C
cattle ranching, water pollution, air pollution
D
water pollution, logging, mining
6

What is one way people positively affect water resources?

A
polluting from nonpoint sources
B
increasing farming and construction
C
disposing of chemicals in water
D
limiting use of acid and other pollutants
7

What term refers to the practice of renewing destroyed ecosystems?

A
erosion
B
terrace farming
C
habitat restoration
D
tree belting
8

Which challenge arises from trying to protect the environment?

A
high clean-energy startup costs
B
less access to clean water
C
lower taxes for citizens
D
more land available for farming
9

What human activity contributes to air pollution?

A
construction
B
reforestation
C
habitat restoration
D
dam development
10

Which activity is a method of habitat restoration?

A
cleaning up after environmental disasters
B
allowing trees to grow naturally
C
farming techniques like terrace farming and tree belts
D
creating a reservoir to prevent flooding

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