Unit Test ESS.4- Earth's Natural Resources Answers

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1
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Why was it important to establish the Clean Air Act?

A
to reduce the need to study the effects of dirty air on human health
B
to determine ways to reduce the number of premature deaths per year
C
to create a regulation that makes any activities that pollute the air illegal
D
to raise the cost of air purification techniques to ensure the efficiency of removing air pollution
2
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Which three gases are released into the atmosphere when volcanoes erupt?

A
radon, water vapor, carbon monoxide
B
radon, helium, nitrogen
C
nitrogen, water vapor, carbon dioxide
D
carbon dioxide, carbon monoxide, radon
4

Which solution would help local farms if the water level in a reservoir used for irrigation became low?

A
Build chinampas to raise the farmland.
B
Build wind-powered pumps to use groundwater.
C
Use shadufs to dig out the reservoir.
D
Turn farmland into paddies.
5

Which resource is a nonrenewable resource?

A
fresh water
B
maple trees
C
solar energy
D
precious metal
6

Which federal agency helps foreign governments with international conservation efforts?

A
US Forest Service
B
US Fish and Wildlife Service
C
Bureau of Land Management
D
National Park Service
10

Which step of desalination must be done before water is condensed and collected?

A
Water is heated until it evaporates.
B
Water is frozen, so it becomes ice.
C
Water is transported from one area to another area that has little water.
D
Water is collected and salt is allowed to settle at the bottom.
11

Which statement explains how smog forms?

A
Volcanoes erupt and release ash into the sky.
B
Strong storms pick up soil and mix it with fog.
C
Sunlight and heat react with gases in the atmosphere.
D
Gases move high into the atmosphere and then fall to Earth in rain.
12

Which environmental policy must consider the expensive startup costs associated with building machines that harvest energy from clean sources?

A
reducing air pollution
B
regulating deforestation
C
introducing new farming methods
D
protecting ocean reefs
15

How does the construction of dams positively affect natural resources?

A
by providing water for irrigation and restoring trees to areas where forests once existed
B
by creating reservoirs, preventing flooding, and renewing destroyed ecosystems
C
by preventing flooding, creating reservoirs, and providing water for irrigation
D
by renewing destroyed ecosystems and restoring trees to areas where forest once existed
16

Not all countries have adopted air quality regulations as America has.What impact on human health would these countries experience if they adopt air quality regulations similar to the Americas?

A
The amount of exposure to outdoor and indoor air pollution would remain unchanged.
B
The number of premature deaths related to ultrafine particulate exposure would increase.
C
People would experience a decrease in negative health effects associated with air pollution.
D
Effects from impaired breathing would only decrease for those exposed to outdoor air pollution.
17

Which statement describes clean air as a natural resource?

A
Clean air can always be found indoors.
B
Clean air provides nitrogen gas for plant respiration.
C
Clean air is produced when high levels of ultrafine particles circulate.
D
Clean air reduces the risk of illnesses and other health problems.
19

Examine the pictures.

Question illustration
A
coal
B
gasoline
C
oil
D
wind
20

Which best explains the effect of reforestation on land?

A
It allows crops to grow in wide steps along slopes.
B
It turns land slowly into desert.
C
It turns habitable land uninhabitable.
D
It restores trees to areas where they once grew.

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