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.
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 Please select the best answer from the choices provided
Which of the following is a way in which surface mines impact an environment ecologically?a.soil erosionb.introducing new species of flora and faunac.creation of groundwater systemsd.all of the above
Which of the following is not a consequence of moving from underground mining to surface mining?a.increased land degradationb.increased water and air pollutionc.mining collapsesd.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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