AnswersOH-Environmental Science CRUnit Test

Unit Test — Unit test Answers

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1
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Which of the following is required for dark reactions to take place?

A
light
B
oxygen
C
ATP
D
water
2
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Energy in an ecosystem flows directly from _______.

A
producers to tertiary consumers
B
producers to secondary consumers
C
tertiary consumers to secondary consumers
D
secondary consumers to tertiary consumers
3

Which of the following statements about resource use is true?

A
The use of renewable resources has no inherent costs.
B
Resource use, whether renewable or nonrenewable, must be carefully managed to reduce the impact on the environment.
C
Nonrenewable resources are used for energy, because there are no renewable resources that can be used as a source of energy.
D
The overuse of nonrenewable resources is less environmentally damaging than the overuse of renewable resources.
4

Which of the following statements about nuclear energy is true?

A
Nuclear energy cannot be contained nor controlled.
B
Nuclear energy is contained in nuclear bonds.
C
Nuclear energy is less efficient than other energy forms.
D
All of the above are true.
5

Which of the following statements about the use of nuclear energy is true?

A
Nuclear energy cannot be used safely.
B
Nuclear fusion has no known useful applications.
C
Nuclear fission is currently more useful for producing energy than nuclear fusion.
D
Nuclear fusion has fewer safety risks than nuclear fission.
6

Which of the following statements about C4 carbon fixation is not true?

A
C4 carbon fixation is an adaptation for plants exposed to high light intensity.
B
C4 carbon fixation occurs in more plants than C3 carbon fixation.
C
C4 carbon fixation is more common in areas of high temperatures than C3 carbon fixation.
D
C4 carbon fixation occurs in the inner cells of a leaf rather than the entire leaf.
7

Which of the following is not a technology that can be used to conserve resources?

A
hydropower
B
volcanic power
C
natural gas
D
geothermal
8

How can reduced precipitation lead to limited water availability?

A
Reduced precipitation leads to overuse.
B
Precipitation is a nonrenewable resource.
C
Reduced precipitation is a global event.
D
Reduced precipitation may lead to drought.
9

Which of the following statements about entropy is true?

A
Entropy increases going from one trophic level to another.
B
Increases in entropy lead to reversible processes.
C
A system’s work output is limited when changes in entropy do not occur.
D
All of the above
10

Primary productivity is not limited by _______.

A
the availability of sunlight
B
time
C
the availability of nutrients
D
access to water
11

Cyanobacteria have been engineered to produce isobutanol directly. What advantage does this have over other alternative biofuels?

A
It is an inherently renewable fuel source.
B
Multiple processing steps can be avoided.
C
They produce chemical energy through photosynthesis.
D
They make a biofuel alternative to gasoline.
12

Which of the following is not an example of energy transformations in an ecosystem?

A
sunlight driving photosynthesis in plants
B
herbivores feeding on plants
C
predators feeding on herbivores
D
none of the above
13

Which of the following statements about using geothermal energy is not true?

A
Geothermal energy can be used to fuel vehicles.
B
Geothermal energy can be used as a source of electricity.
C
Geothermal energy can be used as a source of heat.
D
Geothermal energy is a renewable resource.
14

What two countries have nearly 50% of global coal reserves?

A
United States and Canada
B
United States and Russia
C
Brazil and Russia
D
Brazil and Canada
15

Which of the following statements about paper recycling is not true?

A
Recycling one ton of newspaper can save 100 trees.
B
Recycling paper can lead to 74% less air pollution.
C
Paper recycling can save on the use of water resources.
D
Recycling paper can lead to 35% less water pollution.
16

The operation of nuclear power plants in the United States is closely monitored and regulated.

A
T
B
F
17

Energy in higher trophic levels is greater than energy at lower trophic levels.

A
T
B
F
18

Which of the following is true concerning the balance between the solar energy absorbed and radiated by Earth?

A
Earth’s atmosphere absorbs a larger fraction of total solar energy than it radiates.
B
More than 90% of the solar energy that strikes Earth is absorbed.
C
Earth’s surface is responsible for absorbing a larger fraction of energy than it radiates.
D
None of the above.
19

The use of non-local resources is associated with certain economic and environmental consequences.

A
T
B
F
20

Which of the following is true concerning natural resources?

A
Natural resources are not recycled.
B
Natural resources are only inorganic.
C
They are part of natural processes.
D
They only incorporate one form of matter.

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