AnswersSC332 Environmental Science BHuman Impact on the Environment

Human Impact on the Environment — Unit test Answers

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1
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Which gases contribute to the greenhouse effect?

A
nitrogen and helium
B
carbon dioxide and methane
C
carbon dioxide and helium
D
nitrogen and methane
2
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Which results from an increase in the greenhouse effect?

A
continental shifts
B
wildfires
C
volcanic eruptions
D
global warming
3

Which water source may become polluted as it travels over land?

A
ponds
B
groundwater
C
oceans
D
runoff
4

Which is a sustainable practice?

A
operating wind farms
B
clear cutting
C
flood irrigation
D
overfishing
5

A new highly nutritious crop is going to be planted in an area where it has never been planted before. Which is the most likely outcome of such an event?

A
positive as it malnourishes the local population
B
positive as it changes local biodiversity
C
negative as it threatens local biodiversity
D
negative as it malnourishes the local population
6

Which is a consequence of global warming?

A
cooling oceans
B
growing glaciers
C
less frequent hurricanes
D
rising sea levels
7

As the human population grows, what happens to our natural-resource requirements?

A
They increase.
B
They decrease.
C
They do not change.
D
They go in cycles.
8

Which type of pollution includes CFCs and smog?

A
land
B
air
C
water
D
volcanic
9

A factory is emitting large amounts of CFCs into the atmosphere. How might this affect people?

A
increase in the rate of malaria breakouts
B
increase in the level of ocean water
C
increase in the rate of skin cancer
D
increase in the frequency of violent storms
10

Why are invasive species dangerous to the environment?

A
They pollute the environment.
B
They are all voracious predators.
C
They threaten biodiversity.
D
They are nonrenewable.
11

What are sustainable use practices?

A
any materials that exist in nature and that are used by humans
B
the managed consumption of natural resources to prevent their depletion or environmental destruction
C
the deployment of fossil fuels to environments that previously did not have access to such resources
D
ways in which individuals are able to conserve native animal and plant species
12

Which of the following substitutions can help reduce air pollution?

A
using a bike instead of a car
B
using dumps instead of landfills
C
using coal instead of oil
D
using fireplaces instead of a wind farms
13

Which water source may become polluted as it travels over land?

A
ponds
B
groundwater
C
oceans
D
runoff
14

Which describes the greenhouse effect?

A
an artificial process
B
a dangerous process
C
a natural process
D
a new process
15

Scientists predict that we will eventually use up all available fossil fuels. Which list includes only fossil fuels?

A
wood, natural gas, and coal
B
natural gas, coal, and oil
C
wood, natural gas, and solar
D
coal, oil, and solar
16

Which is a renewable resource?

A
petroleum
B
wood
C
iron
D
coal
17

Which is a nonrenewable resource?

A
soil
B
fish
C
wood
D
coal
18

Which is a nonrenewable resource?

A
soil
B
fish
C
wood
D
coal
19

Which is a renewable resource?

A
petroleum
B
wood
C
iron
D
coal
20

Freshwater can be renewed, but environmentalists consider it nonrenewable. Why is there a contradiction in classification?

A
Freshwater is recycled through the use of irrigation, bathing, and everyday use.
B
Freshwater is easily polluted or depleted before it can be replaced.
C
Freshwater evaporates and condenses, and then precipitation returns it to the lakes.
D
Freshwater is highly affected by global warming, and is quickly evaporating.

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