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Earth Sci Ch 3 Unit
Question | Answer |
---|---|
minerals are comprised of one or more | elements |
a mineral is classified as an ore as long as | it is profitable and useful |
one of the softest minerals is | talc |
all minerals share the following characteristics EXCEPT that of | being formed from living organisms |
Muscovite mica will peel off in flat sheets, this is an example of the physical characteristics called | cleavage |
calcite will scratch gypsum, this is an example of the physical characteristics called | hardness |
the properties of being __________ make a diamond a gemstone | rare and beautiful |
the cost of separating a mineral from waste rock becomes too great, the mineral may no longer be classified as an ore | the mineral can no longer be mined at a profit |
what is true about minerals | they are naturally occurring and inorganic |
is NOT a test used to identify minerals | magnetism |
minerals always exist in a _______________ form | solid |
silver, gold, and copper have shiny surfaces and thus are said to have | metallic luster |
best represents a native element | silver (Ag) |
mica has a hardness of 3. Quartz has a hardness of, therefore | quartz can scratch mica |
mineral that is the most common ingredient in nails and screws | iron |
NOT true regarding gemstones | most gemstones are made of only one element |
does NOT contain a mineral | glass |
NOT a requirement for a material to be considered a mineral | formed in a laboratory |
mineral that is mined so that aluminum can be produced | bauxite |
why should you test several properties when identifying minerals | two different minerals can share one or more properties |
rocks that have a desired substance which can be mined for a profit | ores |
type of internal structure best represents a gemstone | predictable crystal patterns |
tool best for seeing the internal structure of a mineral | creating X-ray images of the mineral |
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