AnswersDRHS GA-GSE Environmental ScienceHuman Events and the Environment

Human Events and the Environment Answers

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1
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Tillage can release pollutants in the soil and

A
increase erosion.
B
decrease erosion.
C
promote soil compaction.
D
promote fertilizer retention.
2
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Which of the following statements about pesticides and herbicides is not true?

A
They can enter waterways, polluting them.
B
Once the pesticides and herbicides break down, they are no longer harmful.
C
Pesticides and herbicides are widely used in agriculture.
D
Pesticides and herbicides can have negative effects on the environment.
3

How is the environment affected by a large-scale oil spill?

A
Large-scale oil spills are the largest contributor to air pollution.
B
Large-scale oil spills lead directly to wetlands becoming deserts.
C
Large-scale oil spills are damaging to water quality, aquatic life, and bird populations.
D
Large-scale oil spills can lead to an increase in sea levels through glacial melting.
4

What sometimes occurs when reclaimed water is used in agriculture?

A
crop death
B
overtillage
C
pharmaceutical accumulation
D
increased land use
5

How can fertilizer use be detrimental to the environment?

A
It can enter waterways, causing them to accumulate an excess of nutrients.
B
High levels of fertilizer in bodies of water can lead to excess algal growth.
C
Fertilizer can lead to oxygen depletion, and be harmful to organisms in waterways.
D
All of the above
6

Large-scale fires can lead to a decrease in atmospheric carbon dioxide.

A
T
B
F
7

Dead zones in waterways can occur as the result of fertilizer runoff.

A
T
B
F
8

Which of the following factors can lead to desertification in the presence of natural drought?

A
deforestation
B
sustainable grazing
C
underground mining
D
all of the above
9

Which of the following is a consequence of sedimentation to wetlands?

A
increased biodiversity
B
water quality improvement
C
habitat loss
D
decreased turbidity
10

Sedimentation increases with an increase in land used for agriculture.

A
T
B
F
11

Dryland planting can benefit the environment by reducing the need for tillage.

A
T
B
F
12

Which of the following large-scale environmental catastrophes has the least effect on aquatic ecosystems?

A
oil spills
B
deforestation
C
global warming
D
pollution
13

Which of the following was an environmental consequence of the nuclear meltdown at Chernobyl?

A
evacuation of Pripyat
B
high levels of radiation
C
increased CO2 levels
D
none of the above
14

How can global warming lead to changes to the Earth’s surface?

A
Global warming can lead to an increased number of earthquakes, which change the Earth’s surface.
B
Global warming can lead to glaciers melting, causing flooding to areas and the decrease of glacial land masses.
C
Global warming leads to a decrease in water levels of coastal wetlands.
D
Global warming cannot lead to changes to the Earth’s surface.
15

Degradates, unlike their parent compounds, are always completely harmless.

A
T
B
F
16

How can the practice of tillage be harmful to the overall environment?

A
It can impact waterways through sedimentation and pollution.
B
It is harmful to the soil that is tilled.
C
Tillage decreases overall crop productivity.
D
All of the above

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