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Clay is an example of ________.


A) a carbonate that forms from weathering of other carbonates
B) a silicate that forms from weathering of other silicates
C) a sulfate that forms from weathering of other sulfates
D) a halide that forms from weathering of other halides

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A compound is a stable chemical substance composed of two or more ________.

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Which of the following is not a fundamental particle found in atoms?


A) neutron
B) selectron
C) electron
D) protons

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Which one of the following is not true for minerals?


A) They have a specific,internal,crystalline structure.
B) They can be a liquid,solid,or gas.
C) Many have a specific,predictable chemical composition.
D) They can be identified by characteristic physical properties.

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Although fluorite and native sulfur are not metallic minerals,deposits of these materials are still called ore deposits.

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Mineral luster is broadly classified as either being metallic or opaque.

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Atoms that share electrons have a(n) ________ bond.


A) covalent
B) ionic
C) partial
D) metallic

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One significant difference between an ionic bond,where electrons are taken from one atom and added to another atom,and a covalent or metallic bond,where electrons are shared,is ________.


A) ionic bonds are stronger than covalent or metallic bonds
B) ionic bonds produce ions but covalent and metallic bonds do not produce ions
C) ionic bonds make a material more malleable than covalent and metallic bonds
D) ionic bonds do not result in the attraction of oppositely charged atoms,but covalent and metallic bonds do

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What mineral is the hardest known substance in nature?


A) silicate
B) native gold
C) diamond
D) muscovite

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What kind of time span is required to produce most mineral deposits?


A) 1-100 years,or about a human life span
B) tens of thousands to millions of years
C) billions of years
D) We have no way of knowing this,but most were formed at the same time as the Earth.

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amorphous bladed tabular cubic

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Most substances are electrically neutral.

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Talc and graphite are two of the lowest minerals on the hardness scale.They are also described by terms like greasy or soapy.Both have a crystal structure characterized by sheet-structures at the atomic level,yet they don't behave like micas.What accounts for their unusual physical properties?

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The chemical bonds between the...

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The bond between two hydrogen atoms (a covalent bond) is based on the force of attraction between ________.


A) two atoms
B) two nuclei
C) two ions
D) protons in the nuclei and electrons surrounding the nuclei

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Which of the following is a renewable resource?


A) coal
B) ice
C) helium gas
D) rock salt

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The mineral fluorite is commonly sold in mineral shops as octahedral (8-sided) objects.This shape originates from ________.


A) the typical crystal form of fluorite
B) a pseudomorph (false form) of fluorite from replacement of a salt,potassium chlorite,that grows in octahedral crystals
C) the growth of fluorite in caves and is the form the crystals grow in the open cavern
D) cutting a larger crystal along four perfect cleavage planes,forming a cleavage fragment

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Building stone,sand and gravel,and fertilizers are industrial materials that are a special class ore deposits but are usually subject to the same regulations as other ores.

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A naturally occurring concentration of metallic minerals that can be extracted economically is called ________ whereas any occurrence of useful minerals that are formed in such quantities that eventual extraction is reasonably certain,but not necessarily profitable,are called ________ resources.

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Clay minerals are light silicates that form ________.


A) from molten rock
B) from mechanical weathering of any rock
C) from chemical weathering of igneous rocks
D) from pressure and heat.

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A cubic centimeter of quartz,olivine,and gold weighs 2.5,3.0,and 19.8 grams,respectively.This indicates that ________.


A) gold has a higher density and specific gravity than quartz and olivine
B) gold is 6 to 7 times harder than olivine and quartz
C) gold and olivine are silicates,whereas quartz is elemental silicon
D) olivine and quartz powders are harder than metallic gold

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