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Rocks and Minerals
N/A
21
Science
7th Grade
01/08/2014

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Cards

Term
What is a mineral?
Definition
It is a natural occurring, inorganic, solid with a definite chemical composition
Term
How many elements occur naturally in the earths crust?
Definition
90
Term
What is the most common mineral and what elements does contain?
Definition
Silicate
Term
What elements does it contain?
Definition
Oxygen and silicon
Term
Hardness
Definition
How hard a mineral is
Term
What scale is used to tell how hard a mineral is
Definition
Moh's scale
Term
Hardest Mineral on the sacle
Definition
Diamond-10
Term
Softest on the scale
Definition
Talc-1
Term
Name and describe seven physical properties of minerals
Definition
Term
Luster
Definition
how it reflects light
Term
Specific Gravity
Definition
Density
Term
Cleavage
Definition
When it breaks on the plane
Term
Streak
Definition
color of mineral powder
Term
Fracture
Definition
breaks unevenly
Term
Appearance
Definition
Color, texture
Term
What 2 characteristics make a mineral a gem
Definition
Rare, Beautiful
Term
What is an ore
Definition
A useful substance that can be mined for profit
Term
Name 3 examples of ores
Definition
magnetite
Term
Definition
Hematite
Term
Definition
bauxite
Term
What is smelting
Definition
Removing a useful substance from an ore
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