Unit 5 Flashcards
1
Q
used to extract minerals or ore deposits that are close to surface
A
surface mining
2
Q
removal of strips of soil and rock
A
strip mining
3
Q
creates a large visible pit or hole in the ground
A
open-pit mining
4
Q
entire top of mountain removed with explosives
A
mountaintop removal
5
Q
process of looking for minerals, metals or precious stones in river sediments
A
placer mining
6
Q
- unwanted waste material created during mining
- usually contain toxic materials used in the process of extracting the resource
A
mine tailings
7
Q
used when resource is more than 100 m/ 328 ft below Earth’s surface
A
subsurface mining
8
Q
Which type of mining is the safest?
A
placer mining
9
Q
Which type of mining is the most dangerous?
A
subsurface mining
10
Q
- decrease in pH
- the formation and movement of highly acidic water rich in heavy metals
A
acid mine drainage
11
Q
turn soil into desert
A
desertification
12
Q
a naturally occurring solid material from which a metal or valuable mineral can be profitably extracted
A
ore
13
Q
- this describes the ability of soil to absorb and release cations.
- Clay particles (-) in soil attract mineral cations and release them for plants use.
A
Cation Exchange Capacity
14
Q
- this describes the proportion of bases (Ca, Mg, K) to acids (Al, H) in soil
- Soil bases are good for plants.
A
Base Saturation
