Unit Test — Unit test Answers

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Which human activity is correctly paired with the greenhouse gas that it increases?

A
rice cultivation and water vapor
B
landfilling and carbon dioxide
C
deforestation and methane
D
sewage treatment and nitrous oxide
2
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Rainforests around the world are being cleared at an alarming rate to make room for new communities, agriculture, mining, and roads, and to provide lumber for construction and furniture. How might the destruction of rainforests affect the balance of gases in Earth's atmosphere?

A
by increasing carbon dioxide and decreasing oxygen
B
by increasing carbon dioxide and increasing oxygen
C
by decreasing carbon dioxide and increasing oxygen
D
by decreasing carbon dioxideand decreasing oxygen
3

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.
4

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.
5

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.
6

Which activity uses water for both recreational and industrial purposes?

A
machinery cooling
B
waterskiing
C
irrigation
D
fishing
7

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
8

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
9

Which of the following types of sites does the National Park Service manage?

A
memorials
B
wildlife refuges
C
ecosystems
D
endangered species
10

Which resource is a nonrenewable resource?

A
fresh water
B
maple trees
C
solar energy
D
precious metal
11

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
12

A restaurant advertises that it is environmentally friendly. It describes the solar panels it uses to generate electricity and the locally grown produce it serves. All the meals it offers are prepared over an open wood fire. Food is served on recycled copper plates, and drinks are served in recycled aluminum cups.Which correctly lists three renewable resources used by the restaurant?

A
aluminum, copper, produce
B
copper, produce, sunlight
C
produce, sunlight, wood
D
sunlight, wood, aluminum
13

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.
14

Which term refers to the loss of fertile soil from drying out?

A
erosion
B
desertification
C
depletion
D
overuse
15

Which sustainable practice is paired correctly with its impact on the environment?

A
Using bamboo results in an increased use of forest trees.
B
Practicing contour plowing results in a need for more land.
C
Setting irrigation systems to run longer results in a reduction of water use.
D
Building more wind farms results in a reduction of fossil fuel use.
16

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
17

Which mineral resource is used to make batteries?

A
graphite
B
gypsum
C
talc
D
clay
18

Why is urbanization contributing to pollution?

A
People in urban areas strip the soil of nutrients and make it difficult to grow crops.
B
People in urban areas consume more energy, food, and water.
C
People in urban areas remove minerals and metals from the ground, which increases erosion.
D
People in urban areas log forests and mine, which causes climate change.
19

What farming method is used in dry or desert areas?

A
chinampas
B
drip irrigation
C
wind-powered pumps
D
aqueducts
20

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

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