Rocks & Minerals NOTES Pages 1 - 3
Rocks & Minerals NOTES Pages 1 - 3. Frayer Model Box #1 What is a mineral? It is a substance which has a naturally occurring inorganic definite chemical.
Dec 27, 2015
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Rocks & MineralsNOTES
Pages 1 - 3
Frayer Model Box #1
What is a mineral?
It is a
substance which has a
naturally occurring inorganic
definite chemical composition
What would be the opposite of this?
man-made Organic(Living)
mixture
ESRT Mineral Chart Click Here
Frayer Model box #2
Minerals can be made of the same elementsBut have different physical properties because of the way their atoms are arranged.
Two examples of common mineralsClick Here
Frayer Model Box #3
The Least Useful Physical Property Used to Identify Minerals
Color
a poor indicator
minerals can be multiple colors
many minerals are the same color
Frayer Model Box # 4The Most Useful Physical Properties
Used to Identify Minerals
1. Streak
2. Luster3. Hardness4. Fracture5. Cleavage6. Magnetism
The Main Physical Properties Used to Identify Minerals
#1. Streak
The mark left when a mineral is rubbed on a tile.
the powder form of a mineralmore reliable than color
The Main Physical Properties Used to Identify Minerals
#2. Luster
how light reflects(bounces) off a mineral.
metallic non-metallic
looks like a metal
looks earthy, waxy, greasy ,dull,pearly,
silky
The Main Physical Properties Used to Identify Minerals
#3. Hardness
resistance to being scratched
It is NOT the same as breaking!
For example: You can break glass easily with steel.However, steel will not scratch glass.
The Main Physical Properties Used to Identify Minerals
Hardness Continued
MOH’S SCALE OF HARDNESS
Hardness
Mineral Hardness
Mineral
1 (softest) 6
2 7
3 8
4 9
5 10 (hardest)
TALC
GYPSUMCALCITE
FLUORITE
APATITE
ORTHOCLASE
QUARTZTOPAZ
CORUNDUMDIAMOND
Fingernail- 2.5 copper coin 3 and 4
Iron nail- 5 tile-6.5
The Main Physical Properties Used to Identify Minerals
#4. Fracture
The mineral breaks randomly and unevenly because of the arrangement of
atoms.
The Main Physical Properties Used to Identify Minerals
5. Cleavage
• The mineral breaks in a predictable pattern because of its arrangement of atoms.
• Some minerals break into smooth flat sheets.
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