Question

Minerals that have no real commercial value:
(2 Points)


Ore minerals

Gravity

Alloys

Gangue minerals
2.A common form of subsurface mining that consists of a network of entries (called rooms) and pillars of the ore to support the ceiling:
(2 Points)


Gravity

Open-pit

Room-and-pillar

Longwall
3.These ore minerals tend to be shiny, opaque, and conduct electricity very easily:
(2 Points)


Gravity

Metals

Nonmetals

Gangue minerals
4.A naturally occurring, usually inorganic solid that has a characteristic chemical composition, an orderly internal structure, and a characteristic set of physical properties:
(2 Points)


Mineral

Water vapor

Rocks

Gravity
5.These ore minerals tend to be more dull than shiny, great insulators, and allow light to pass through them:
(2 Points)


Gangue minerals

Nonmetals

Gravity

Metals
6.This term refers to the combination of two or more metals:
(2 Points)


Gangue minerals

Ore minerals

Alloys

Gravity
7.Which form of mining is used when the ore deposits are located close to Earth's surface?
(2 Points)


Subsurface mining

Smelting

Surface mining

Gravity
8.This form of subsurface mining uses a machine called a shearer that moves back & forth across the face of the ore mine tunnel:
(2 Points)


Gravity

Longwall

Quarrying

Room-and-pillar
9.This process uses crushed ore and melts it at extremely high temperatures in a furnace to separate it from impurities from molten metal:
(2 Points)


Smelting

Washing

Threshing

Gravity
10.Minerals that are valuable and economical to extract are known as:
(2 Points)


Gravity

Gangue minerals

Ore minerals

Water vapor

Answer 1

1. Gangue minerals
2. Room-and-pillar
3. Metals
4. Mineral
5. Nonmetals
6. Alloys
7. Surface mining
8. Longwall
9. Smelting
10. Ore minerals