Answers OK-Environmental Science-Sem B -CA- 36431B Minerals and MiningQuestion 7

7

QuizMultiple Choice

Minerals and Mining

Question 7 • OK-Environmental Science-Sem B -CA- 36431B

How is coal extracted from mountaintop removal mines?

Answer

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.

Explanation

Mountaintop removal is a form of surface mining. Explosives break apart the rock covering the coal, and large draglines remove that rock so miners can reach the coal seam. Choice B describes this process; underground tunnels, strip mining, and sifting river sediment are different methods.

AI-written and checked against the verified answer.

More from this Course

10 verified answers

Human Use of Land

10 verified answers

The Importance of Trees

10 verified answers

Human Use of Land