Minerals and Mining Answers

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1
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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
2
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Reclamation restores an environment affected by mining to a state where it can sustain its ecosystem.

A
T
B
F
3

What are the two types of minerals?

A
industrial and environmental
B
valuable and invaluable
C
metallic and nonmetallic
D
important and unimportant
4

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

A
industry
B
construction
C
technology
D
all of the above
5

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
6

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
7

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

A
radioactivity
B
magnetism
C
gravity
D
all of the above
8

Closing mines has no economic impact on communities.

A
T
B
F
9

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.
10

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

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