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Human Events and the Environment Answers

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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
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.
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 death
B
overtillage
C
pharmaceutical accumulation
D
increased land use
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 practices
B
decrease the number of agricultural facilities by 1/3 in ten years
C
create a database of climate friendly agricultural practices
D
convert all farms to climate friendly practices

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