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Minerals and Mining Answers

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1
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Which of the following readings is used to determine the availability of minerals?

A
radioactivity
B
magnetism
C
gravity
D
all of the above
2
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A mineral is a naturally occurring solid with a regular, repeating structure.

A
T
B
F
3

Closing mines has no economic impact on communities.

A
T
B
F
4

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.
5

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
6

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.
7

Which of the following is a way in which surface mines impact an environment ecologically?

A
soil erosion
B
introducing new species of flora and fauna
C
creation of groundwater systems
D
all of the above
8

What are the two types of minerals?

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

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