Unit 5

Question 1

used to extract minerals or ore deposits that are close to surface

Answer 1

surface mining

Question 2

removal of strips of soil and rock

Answer 2

strip mining

Question 3

creates a large visible pit or hole in the ground

Answer 3

open-pit mining

Question 4

entire top of mountain removed with explosives

Answer 4

mountaintop removal

Question 5

process of looking for minerals, metals or precious stones in river sediments

Answer 5

placer mining

Question 6

• unwanted waste material created during mining
• usually contain toxic materials used in the process of extracting the resource

Answer 6

mine tailings

Question 7

used when resource is more than 100 m/ 328 ft below Earth’s surface

Answer 7

subsurface mining

Question 8

Which type of mining is the safest?

Answer 8

placer mining

Question 9

Which type of mining is the most dangerous?

Answer 9

subsurface mining

Question 10

• decrease in pH
• the formation and movement of highly acidic water rich in heavy metals

Answer 10

acid mine drainage

Question 11

turn soil into desert

Answer 11

desertification

Question 12

a naturally occurring solid material from which a metal or valuable mineral can be profitably extracted

Answer 12

ore

Question 13

• this describes the ability of soil to absorb and release cations.
• Clay particles (-) in soil attract mineral cations and release them for plants use.

Answer 13

Cation Exchange Capacity

Question 14

• this describes the proportion of bases (Ca, Mg, K) to acids (Al, H) in soil
• Soil bases are good for plants.

Answer 14

Base Saturation