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ameck
minerals
20
Science
7th Grade
01/08/2014
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Term
what is a mineral
 Definition
a mineral is a naturally occuring inorganic solid with a definite chemical composition and an orderly arrangement of atoms
Term
how many elements occur naturally in the Earth's crust
 Definition
90
Term
what is the most common mineral
 Definition
silica
Term
what element does silica contain
 Definition
silicon
Term
name and describe physical feautures
 Definition
apperance
Term
physical feauture
 Definition
cleavage
Term
physical feature
 Definition
hardness
Term
scale
 Definition
moh's scale (1-10)
Term
scale#2
 Definition
diamond 10
Term
scale #3
 Definition
talc 1
Term
physical feature
 Definition
fracture
Term
physical feature
 Definition
luster
Term
physical feauture
 Definition
streak
Term
physical feauture
 Definition
specific gravity
Term
a mineral is a gem when
 Definition
beutiful, rare
Term
what is an ore
 Definition
if it contains a useful substance that can be minedfor a profit
Term
name three examples of ores #1
 Definition
hematite
Term
name three examples of ores #2
 Definition
magnetite
Term
name three examples of ores #3
 Definition
bauxite
Term
what is smelting
 Definition
removing a useful substance from an ore
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