Earth
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Steven Dutch, Natural and Applied Sciences,University of Wisconsin - Green Bay
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- Most of the world's oil is in:
- a relatively small number of large oil fields
- thousands of small oil fields
- The ancestral material of coal:
- woody material
- vertebrate fossils
- marine plankton
- carbonate rocks
- Geothermal energy is commonly affected by all of the following problems except:
- low efficiency
- mineral deposits clogging pipes
- depletion of steam
- corrosion
- excessively high temperatures
- After ore is blasted loose, the next step in extracting metal is:
- milling
- smelting
- flotation
- crushing
- tailings disposal
- The molten silicate residue that floats to the top during ore smelting:
- tailings
- slag
- gangue
- none of the above
- Mineral deposits where heavy minerals are concentrated by stream or wave action are called:
- hydrothermal
- hydraulic
- stratiform
- placer
- residual
- The most abundant metal in the crust:
- iron
- copper
- nickel
- aluminum
- titanium
- Which is not a major type of ore-forming environment?
- magmatic
- hydrothermal
- sedimentary
- placer
- metamorphic
- The parent material of petroleum:
- woody material
- vertebrate fossils
- marine plankton
- carbonate rocks
- Secondary enrichment makes low-grade ores into richer ores by:
- weathering
- metamorphism
- deformation
- igneous activity
- evaporation
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Created 3 May 1999, Last Update 03 May 2002
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