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Earth Science
Chapter 2
22
Science
Not Applicable
10/08/2005

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Term
five mineral characteristics
Definition
naturally occurring
solid
orderly crystalline structure
definite chemical composition
inorganic
Term
rock
Definition
solid, naturally occuring
aggregate of minerals
Term
ionic bond
Definition
one+ valence electrons are transferred from one atom to another

net positive or negative charge
Term
why might it be difficult to identify a
mineral by its color?
Definition
slight impurities
give minerals a variety of colors

i.e. quartz
Term
cleavage
Definition
tendency of a mineral to break along planes of weak bonding
Term
fracture
Definition
break in rock where no movement has taken place

"opposite" of cleavage
Term
two most common elements in
earth's crust
Definition
oxygen and silicon
Term
building block for for all silicates
Definition
silicon-oxygen tetrahedron
Term
nonsilicate minerals commonly found in rocks
Definition
halie, gypsum, calcite
gold, copper, diamond, silver
Term
difference between mineral resource and reserve
Definition
resource - materials that can be recovered

reserve - minerals not yet recoverable under economic conditions or technology
Term
ore
Definition
useful metallic mineralsthat can be mined at a profit
Term
covalent bond
Definition
sharing electrons

brittle, hard, poor conductors, not very soluble
Term
metallic bonds
Definition
some electrons shared by many atoms

excellent thermal & electrical customers, soft, malleable
Term
Van der Waals bonds
Definition
weak electrostatic interactions among atoms

greasy or soapy, soft, malleable
Term
compounds vs. molecules
Definition
molecule - 2+ atoms joined together

compounds - combined different atoms of more than 1 element
Term
silicates
Definition
mineral that has oxygen and silicon tetrahedron as their basic structures

four oxygen atoms surrounding one silicon atom
Term
carbonates
Definition
react with acid

calcite, dolomite
Term
sulfates
Definition
sedimentary minerals

gypsum
Term
oxides
Definition
one or more metals bonded

hematite, magnetite
Term
sulfides
Definition
sulfur + one or more metal

lead, zinc, copper
Term
halides
Definition
minerals bonded to F, CL, I, or Br

halite (salt), sylvite, evaporite
Term
2 most common silicate minerals
Definition
feldspar

quartz
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