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ch 2 Minerals DC
ch 2 minerals DC
24
Science
8th Grade
09/12/2012

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Term
mineral
Definition
a naturally occurring, inorganic solid that has a crystal structure and a definite chemical composition.
Term
naturally occurring
Definition
not made by people, minerals must be this.
Term
inorganic
Definition
cannnot arise from materials that were once part of a living thing.
Term
solid
Definition
a definite volume and shape. a mineral is always this.
Term
crystal
Definition
the repeating pattern of a mineral's particles forms a solid
Term
faces
Definition
flat sides of a crystal
Term
element
Definition
a substance composed of a single kind of atom.
Term
compound
Definition
two or more elements are chemically joined. Each has its own properties.
Term
mixture
Definition
consists of two or more substances that are mixed together but not chemically combined.
Term
mohs hardness scale
Definition
a test used to describe and compare the hardness of minerals
Term
streak
Definition
the color of a minerals powder
Term
luster
Definition
how a mineral reflects light
Term
density
Definition
mass in a given space
Term
cleavage
Definition
mineral that splits easily along fllat surfaces
Term
fracture
Definition
describes how a mineral looks when it breaks appart in a irregular way
Term
flouresence
Definition
minerals that glow under ultra violet light
Term
magma
Definition
molten material from earths mantel
Term
lava
Definition
magma that reaches the surface
Term
solution
Definition
mixture in which one mineral dissolves another
Term
vein
Definition
narrow channel or slab of a mineral that is much diffrent from the surrounding rock
Term
gemstone
Definition
hard colorful mineral that has a brilliant or glassy luster
Term
alloy
Definition
solid mixture of two or more metals
Term
ore
Definition
a rock that contains a metal or economically useful mineral
Term
smeltong
Definition
melting ore to separate the useful metal from other elements the ore contains
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