AnswersOK-Environmental Science-Sem B -CA- 36431BUnit Test

Minerals and Mining Answers

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1
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Minerals are mined both at the Earth’s surface and below it.

A
T
B
F
2
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Which of the following methods of extraction is the most damaging to the environment?

A
surface mining
B
subsurface mining
C
placer mining
D
none of the above
3

Why does mining have such an impact on the environment?

A
Mining only affects the living parts of the environment.
B
Because minerals are within the Earth’s surface, extraction causes destruction.
C
Mining requires the absolute destruction of an area to be cost-effective.
D
Areas that are mined can never again sustain plant life.
4

Mining has only short-term effects on the Earth.

A
T
B
F
5

A mineral is a naturally occurring solid with a regular, repeating structure.

A
T
B
F
6

Reclamation restores an environment affected by mining to a state where it can sustain its ecosystem.

A
T
B
F
7

How is coal extracted from mountaintop removal mines?

A
Dynamite is used to create underground tunnels where miners go to extract the coal.
B
Dynamite is used to break apart rocks and then draglines are used to remove the broken rock and reach the coal.
C
Coal in mountaintops is extracted by digging strips in the landscape to reach the coal.
D
Placer deposits in mountain river bottoms are removed by sifting through sediment.
8

Which of the following is not a long-term effect of mining in the Picher Mining District?

A
increased levels of lead in the bloodstream
B
increased incidents of kidney disease
C
increased levels of particulates in the air
D
increased amounts of vegetation
9

What is the most likely consequence of open pit mining on plant life?

A
a dramatic reduction in the variety of plant species
B
an increase in the number of plant species
C
the complete loss of plant life in the area occupied by the surface mine
D
a temporary decrease in plant populations
10

Which type of mining is likely the least harmful to the environment?

A
surface mining
B
placer mining
C
subsurface mining
D
none of the above
11

Which of the following is a way that minerals are used?

A
industry
B
construction
C
technology
D
all of the above
12

What are the two types of minerals?

A
industrial and environmental
B
valuable and invaluable
C
metallic and nonmetallic
D
important and unimportant
13

Closing mines has no economic impact on communities.

A
T
B
F
14

Which of the following is a long-term consequence of mining on the Earth?

A
erosion
B
an open pit
C
sedimentation
D
all of the above
15

Which of the following is not a consequence of moving from underground mining to surface mining?

A
increased land degradation
B
increased water and air pollution
C
mining collapses
D
changes to the landscape
16

What is most likely to happen to an abandoned strip mine over time?

A
The strip mine is likely to completely recover over time.
B
The strip mine is likely to remain exactly as it is left when abandoned.
C
The strip is likely to partly recover, but never return to its original state.
D
The strip mine is likely to become a lake.

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