Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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Minerals utilized by humans as a source of metal
are termed ____________.
a. | metallic minerals | b. | ore minerals | c. | source
minerals |
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2.
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Which of the following is NOT a
mineral?
a. | petroleum (oil), which is a
liquid | b. | cubic zirconia, which is a synthetic diamond substitute
that is not found in nature | c. | ice, which is
water in the solid state (and water is essential to all organic life on
Earth) | d. | both A and B are not minerals; however, C is a
mineral |
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3.
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Natural glass is not considered a mineral because
it ____________.
a. | is not produced by geologic
processes | b. | is organic | c. | does not have fixed crystalline structure | d. | can be made synthetically as well as being a naturally occurring
substance |
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4.
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The most recently formed portion of any crystal is
always found ____________.
a. | deep within the interior | b. | on the outer edges |
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5.
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Cleavage in minerals refers to
____________.
a. | a tendency to break in an irregular
pattern | b. | a tendency to break along planes of
weakness | c. | the sharpness of edges between crystal
faces | d. | the development of distinct crystal
faces |
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6.
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The most abundant minerals belong to chemical group
termed the ____________.
a. | silicates | b. | carbonates | c. | halides | d. | oxides |
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7.
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The silica tetrahedron that forms the backbone of
all the silicate minerals is composed of silicon and what other element?
a. | magnesium | b. | oxygen | c. | iron | d. | carbon |
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8.
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In silicate minerals, tetrahedra may be coordinated
to form ____________.
a. | long one-dimensional chains | b. | extensive two-dimensional sheets | c. | massive three-dimensional frameworks | d. | all of the above |
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9.
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With regard to minerals, hardness refers to
____________.
a. | ability to resist breaking when being struck with
hammer | b. | ability to resist being scratched by other
substances | c. | ability to resist
chemical reactions with other substances | d. | an absence of
cleavage |
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10.
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Gemstones are commonly found in pegmatites, which
are igneous rocks that are ____________.
a. | exceptionally mafic | b. | extrusive, forming from lava | c. | exceptionally coarse grained | d. | exceptionally fine grained |
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11.
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In nature most examples of minerals do not grow as
large, well-formed, euhedral crystals.
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12.
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Minerals are classified into groups primarily on a
basis of ____________.
a. | chemistry, specifically the cations within the chemical
formula | b. | chemistry, specifically the anions within the chemical
formula | c. | hardness; hard, soft, and medium are the three primary
classes | d. | number of cleavage directions
present |
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13.
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Which of the following minerals is
hardest?
a. | quartz | b. | calcite | c. | talc | d. | fluorite |
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