AnswersTX-Environmental Systems BUnit Test

Unit Test — Cumulative exam Answers

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1
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Rivers and streams are biodiverse ecosystems that are sensitive to change.

A
T
B
F
2
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How can resource conservation benefit the environment?

A
Resource conservation can help preserve natural habitats.
B
Resource conservation can reduce water pollution.
C
Resource conservation can reduce air pollution.
D
All of the above
3

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
4

Which of the following is a benefit associated with the use of energy producing technologies excluding the burning of fossil fuels?

A
reduced water use
B
reduced air pollution
C
reduced habitat loss
D
all of the above
5

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
6

Which of the following about carbon sinks is not true?

A
They emit more carbon than they take in.
B
They take in more carbon they emit.
C
They store carbon from the atmosphere.
D
They include oceans and forests.
7

The amount of available energy changes between the trophic levels found in a food chain or energy pyramid. Photos (left to right) by Mehmet Karatay, Jens Buurgaard Nielsen, Furryscaly, and Walter Siegmund How would the amount of available energy differ in the trophic level of the mouse compared to the trophic level of the hawk?

Question illustration
A
Available energy would increase from the mouse to the hawk.
B
Available energy would decrease from the mouse to the hawk.
C
Available energy would initially increase from the mouse to the hawk, and then decrease over time.
D
Available energy would remain the same from the mouse to the hawk.
8

The percentage of a hunter-gatherer society’s diet provided by hunting versus gathering was mostly determined by _______.

A
the climate
B
the types of prey
C
hunting skill
D
the size of the human population
9

Why is preventing pollution at its source the first strategy in minimizing environmental risk?

A
It is easier and more effective to prevent pollution than to clean up and dispose of waste.
B
Remediation of contamination is easier than pollution prevention.
C
Habitat restoration cannot be undertaken with modern technologies.
D
Safe waste disposal is the easiest was to minimize environmental risk.
10

Forest management practices can reduce the negative impact of wood harvesting.

A
T
B
F
11

How can the use of biotechnology lead to an increase in soil conservation practices?

A
Biotechnology use can lead to a decrease in pesticide and herbicide use, maintaining soil quality.
B
Biotechnology use can lead to soil compaction, preventing erosion.
C
Biotechnology use can increase the amount of management required for agriculture, increasing the likelihood of the practice of soil conservation.
D
All of the above
12

Moving up trophic levels there is an increase in energy, entropy, and biomass.

A
T
B
F
13

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
14

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.
15

Which of the following scenarios is representative of how agricultural practices can affect the environment?

A
increased oxygen levels in a pond due to fertilizer runoff
B
sediment accumulation in a body of water near a farm
C
soil compaction caused by tillage
D
increased plant growth caused by the application of herbicides
16

Which of the following is a difficulty associated with environmental protection?

A
cost
B
unpredictability
C
sustainability
D
all of the above
17

What is the most important consideration for environmental policy makers?

A
popular opinion
B
environmental health
C
cost
D
none of the above
18

Which of the following best explains why buildings tip during earthquakes?

A
Seismic waves damage buildings’ foundations.
B
The liquefaction of solid soil undermines buildings’ foundations.
C
Body waves break underground water pipes.
D
Surface faulting moves the ground in different directions.
19

Flooding on rivers is caused by human activity rather than natural events.

A
T
B
F
20

What characteristic sets streams and rivers apart?

A
water quality
B
direction of flow
C
size
D
biodiversity

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