Minerals and Mining Answers

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How is coal extracted from mountaintop removal mines?

Dynamite is used to create underground tunnels where miners go to extract the coal.

Dynamite is used to break apart rocks and then draglines are used to remove the broken rock and reach the coal.

Coal in mountaintops is extracted by digging strips in the landscape to reach the coal.

Placer deposits in mountain river bottoms are removed by sifting through sediment.

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

erosion

an open pit

sedimentation

all of the above

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

soil erosion

introducing new species of flora and fauna

creation of groundwater systems

all of the above

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

increased land degradation

increased water and air pollution

mining collapses

changes to the landscape

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

Closing mines has no economic impact on communities.

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