Human Events and the Environment Answers

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1
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Which choice is an example of an effect of agricultural techniques on the environment?

A
increased oxygen levels in a pond due to fertilizer runoff
B
sediment accumulation in a lake near a farm
C
soil compaction caused by tillage
D
increased plant growth caused by application of herbicides
2
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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

A
A
B
B
C
C
D
D
3

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.

A
A
B
B
C
C
D
D
4

Tillage can release pollutants in the soil and

A
increase erosion.
B
decrease erosion.
C
promote soil compaction.
D
promote fertilizer retention.
5

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

A
T
B
F
6

What sometimes occurs when reclaimed water is used in agriculture?a.crop deathb.overtillagec.pharmaceutical accumulationd.increased land use

A
A
B
B
C
C
D
D
7

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

A
T
B
F
8

Sedimentation increases with an increase in land used for agriculture.

A
T
B
F
9

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

A
T
B
F
10

What is the purpose of the Climate Friendly Farming Project?a.close down farms that do not follow climate friendly practicesb.decrease the number of agricultural facilities by 1/3 in ten yearsc.create a database of climate friendly agricultural practicesd.convert all farms to climate friendly practices

A
A
B
B
C
C
D
D

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