Cumulative Exam — Cumulative exam Answers

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21
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Which statement best explains why electricity should be conserved?

A
Fossil fuels generate electricity and are limited in supply.
B
Fossil fuels generate electricity and are expensive.
C
Power plants use a lot of resources and never produce a lot of electricity.
D
Power plants can use only one type of resource to produce electricity.
22
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Which of the following statements about water policy is true?

A
The United States does not regulate water quality.
B
Policies regulating water pollution and water quality have eliminated environmentalists concern about water.
C
Current laws in place about water policy would eliminate water quality problems if they were enforced.
D
The Clean Water Act has helped reduce water contamination, but further efforts are needed to maintain water quality.
24

Which of the following most significantly determines a community's access to potable water?

A
access to clean raw water sources
B
the availability of money
C
local drought conditions
D
the level of industrial development
25

Which of the following is a potential obstacle to the commercial development of brownfields?

A
the presence of pollutants
B
environmental cleanup laws
C
the costs of environmental cleanup
D
all of the above
27

Penelope sees that her brother Angelos is using water carelessly. She warns Angelos to be more careful because water is a renewable resource and can be used up since it takes millions of years to form. Angelos argues that water is a nonrenewable resource and cannot be used up since it can be replaced when it rains.

A
Penelope was correct when she said that water takes millions of years to form.
B
Penelope was correct when she said that water can be used up.
C
Angelos was correct when he said that water is a nonrenewable resource.
D
Angelos was correct when he said that water cannot be used up.
28

Which is an example of a renewable energy source?

A
Option
B
Option
C
Option
D
Option
30

Which of the following best explains why soil conservation is important to human agriculture?

A
Erosion prevention prevents millions of dollars in damage from mudslides.
B
It is easier to prevent the degradation of old soil than it is to generate new soil.
C
If the soil salinity gets too high crops will not be able to grow in it.
D
Soil contamination is a hazard to human and animal health.
31

Which of the following best explains why marine debris is not caused solely by countries bordering the ocean?

A
Marine debris mostly originates from oceangoing ships.
B
Debris is carried to the ocean by winds, rivers, and storms.
C
Marine debris originates from natural sources.
D
None of the above
32

Which of the following is a possible cost of using renewable resources?

A
loss of animal species
B
land degradation
C
lower availability of freshwater
D
all of the above
33

Which of the following statements about mining is true?

A
Mining has no long-term effects on the Earth.
B
Mining is unimportant to the economy.
C
Mining has no ecological impact.
D
Mining allows useful minerals to be extracted from the Earth.
34

The first step in selective breeding is to

A
decide which individuals to breed.
B
study the breeding habits of species.
C
choose which characteristics to breed for.
D
breed two different individuals to see what happens.
35

Which of the following most significantly determines a community's access to potable water?

A
access to clean raw water sources
B
the availability of money
C
local drought conditions
D
the level of industrial development
37

It is important for _______ to participate in conservation efforts.

A
government
B
business
C
citizens
D
all of the above
38

How is the world population projected to change in the next few decades?

A
It is projected to level off.
B
It is projected to decrease steadily.
C
It is projected to increase steadily.
D
It is projected to double within 5 years.
39

It is important to maintain septic systems in order to _______.

A
prevent treated sewage from contaminating groundwater
B
process human waste into fertilizer
C
prevent untreated sewage from contaminating groundwater
D
none of the above
40

Which of the following can be reduced by the use of renewable energy sources?

A
social costs
B
economic costs
C
environmental costs
D
all of the above

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