Chapter 16 Science Test

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two or more metals that are combined

alloy

a quarry could also be called

an open pit

a serious hazard of coal mining is

an underground mine fire

surface mining can cause

both air nor noise pollution

two or more atoms chemically bonded together

compound

a floating barge on which buckets fixed on a conveyor excavate sediments

dredge

large piles of excess rock from mines

dumps

what is one property that may be used to distinguish metallic from nonmetallic minerals?

electrical conductivity

a material that bonds with impurities and separates them from molten metal during smelting

flux

dredging stream beds may be an effective technique for mining

gold

placer deposits are surface deposits concentrated by

movement of wind and water

a network of entries in coal mines

rooms

process by which crushed ore is melted at high temperatures to separate impurities from molten metal

smelting

the sinking of regions of the ground with little or no horizontal movement

subsidence

ore deposits formed in cracks in rocks

veins

about ________ percent of the world's salt comes from the solar evaporation process.

70

a law that set standards to minimize the surface effects of coal mining on the environment

Surface Mining Control and Reclamation Act of 1977

contaminated water that results when acid dissolves toxic minerals remaining in mines and in excess rocks

acid mine drainage

sand, gravel, and crushed rock

aggregates

which of the following is not affected when soil is removed from a surface mine?

deep coal seams

which of the following is one reason why undersea mining has been largely unsuccessful to date?

deposits at great water depths are difficult to work

for mining to be profitable, the price of the product must be

greater than the costs of extraction and refining

what can contaminants a river as a result of dredging?

muddy sediments

a law that regulates the release of hazardous substances into the air, soil, and water by mining operations

Comprehensive Response Compensation and Liability Act

evaporites most commonly form in

arid regions where rates of evaporation are high

which of the following is not a characteristic of a mineral?

atoms in random patterns

finds posted before a mining project begins

bond

before mining a site, a mining company must do all of the following except

cut into a section of the longwall

what do not, subsurface waters contain when they are identified as hydro thermal solutions?

dissolved minerals

solar evaporation is practical in order to obtain salt from sea water in climates where rainfall is exceeded by

evaporation

the first step in finding an ore deposit is

exporting rock formations for mineralization

which of the following is not a way that ore minerals may form?

flooding of empty stream beds and rivers

minerals that have no commercial value

gangue minerals

nonmetallic minerals prized for their beauty, rarity, or durability

gemstones

nonmetallic minerals prized mainly for their beauty, rarity, or durability are called

gemstones

which of the following would not likely be mined using solution mining?

gypsum

the wall of a coal seam

long wall

mining companies can identify areas of valuable mineral resources by

mineral exploration

minerals that are economical to extract

ore minerals

minerals that contain valuable substances

ore minerals

rocks that cover coal seams near the surface

overburden

subsidence can result from the collapse of

pillars in abandoned mines

minerals concentrated by wind and water movement into surface deposits

placer deposits

open pit used to mine materials near the surface

quarry

process of returning land to its original or better condition after mining

reclamation

what is the arrangement of atoms in a mineral?

regular, repeating geometric patterns

a layer of impurities that forms atop molten metal during smelting

slag

which of the following is a water contaminant that can cause acid mine drainage?

sulfuric acid

mining method used when ore deposits are located close to earth's surface

surface mining

which of the following is not a regulation mining companies must follow?

the Hazardous Products Act

the first step in surface coal mining is

to remove and set aside the soil that covers the area to be mined


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