Urban Growth Answers

0 verified answers3 views

Free Preview

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

surface mining

placer mining

subsurface mining

none of the above

Free Preview

Error

Answer not available

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 a way that minerals are used?

industry

construction

technology

all of the above

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.

Mining has only short-term effects on the Earth.

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

radioactivity

magnetism

gravity

all of the above

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

erosion

an open pit

sedimentation

all of the above

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

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

Did you find these answers helpful?

More from this Course