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Rocks
Rocks are kewl E:
19
Science
7th Grade
01/08/2014
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Term
What is a Mineral
 Definition
Naturally occurring inorganic solid
Term
Hardness
 Definition
How hard an object is
Term
Moh's Scale
 Definition
Scale used to measure hardness
Term
What rock is the hardest
 Definition
10-Diamond
Term
Luster
 Definition
How mineral reflects light
Term
Specific Gravity
 Definition
Density
Term
Cleavage
 Definition
When mineral breaks along a plane
Term
What rock is the softest
 Definition
1-Tale
Term
Streak
 Definition
Color of minerals powder
Term
Fracture
 Definition
Breaks unevenly
Term
For a mineral to be a gem it needs to have what characteristics
 Definition
1. It needs to be rare
2. It needs to be beautiful
Term
Ore
 Definition
A useful substance that can be mined for a profit.
Term
Magnetite
 Definition
Iron
Term
Hematite
 Definition
"
Term
Bauxite
 Definition
Aluminum
Term
Smelting
 Definition
Removing a useful substance from an ore
Term
How many elements occur naturally in the Earths crusts?
 Definition
9
Term
What is the most common mineral
 Definition
Silicate
Term
What does the most common mineral contain?
 Definition
Hydrogen
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