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minerals
clayton
26
Science
7th Grade
01/08/2014

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Term
what is a mineral
Definition
naturally occurring inorganic solid with a definite chemical composition and orderly arrangement of atoms
Term
how many elements occur naturally in the earths crust
Definition
90 elements
Term
what is the most commen mineral
Definition
silocates
Term
what elements does silocates contain
Definition
silicon and oxygen
Term
hardness
Definition
how hard an objects is
Term
mohs scale
Definition
scale used to measure hardness
Term
hardest mineral
Definition
diamond 10
Term
softest mineral
Definition
talc 1
Term
luster
Definition
how mineral reflects light
Term
specific gravity
Definition
density
Term
cleavage
Definition
when mineral breaks along a plane
Term
streak
Definition
color of mineral powder
Term
fracture
Definition
breaks unevenly
Term
appearence
Definition
color, texture
Term
for a mineral to be a gem
Definition
rare and beatiful
Term
smelting
Definition
removing a wanted material
Term
ore
Definition
a useful substance that can be mined for a profit
Term
examples of ore
Definition
magnetite-ore
hematite
bauxite-aluminum
Term
what is a blood diamond
Definition
diamond that is illegally traded to fund conflict in war or warturn areas
Term
in what form are the diamonds traded in
Definition
rough form and haven't extracted and cut
Term
what percent of the worlds diamond population was blood diamonds
Definition
4
Term
why are these diamonds bad
Definition
because inocent people involved in trade are killed and many slaves are women men and children do back breaking work to find these diamonds
Term
what was the purpose of the Kimberly process
Definition
to discuss ways to stop trade in conflict diamonds and ensure that diamond purshases arent creating war
Term
what is the requirment of the Kimberly process certification scheme
Definition
all members are required a certificate to they weren't illegally mined
Term
why hasn't the scheme been working as well as hoped
Definition
because of lack in political involvement
Term
mines where operated by millitary
Definition
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