Mining that is done above ground is called...

Mining that is done below ground is called...

This type of mining involves moving HUGE amounts of Earth to access ore.

When ore is extracted from near the surface by digging deep into the ground.

When ore is removed in layers by removing the soil that is on top.

Acid mine drainage is the result of

Petroleum was formed from

when microorganisms like bacteria or plants are used to clean up oil spills by "consuming" crude oil, that is called...

When cost cutting efforts made the drilling rig faulty, oil and natural gas rushed into the drill casing and up into the rig where it was ignited and caused a massive explosion:

What do you call the process of drilling and injecting fluid into a ground at a high pressure in order to break or fracture the shale rocks to release natural gas inside?

What is the purpose of proppants in fracking ?

Which of the following is not a disadvantage of fracking?