Chapter 16 Science Test
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
