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Bellwork 10-28-13Obj: SWBAT explain the properties that are used
in classify minerals.
1. What comes to mind when you see this picture?
2. List as many minerals(at LEAST 2) that you can think of.(example: gemstones)
What is a mineral?1. Must be naturally
occurring
2. Must be a solid
3. Must have a chemical composition
4. Cannot be organicWhat does that mean?
5. Have a defined crystalline structure
How do we ID a mineral?With a partner developed
some ways that you could categorize or separate different minerals?
How do we ID a mineral?Scientists use mineral
properties to ID minerals,Some of these properties include:
ColorStreakCleavageLusterHardness
Mineral Cleavage Cleavage is the tendency of a mineral to cleave, or break, along flat, even surfaces.
Salt has CUBIC cleavage
Gypsum has ONE plane of cleavage
Mineral Luster Luster is used to describe how light is reflected from the surface of a mineral.Luster can be:
MetallicEarthyGlassy
Mineral HARDNESSHardness is a measure of the resistance of a mineral to being scratched.-It is measured on a scale from 1 to 10
-Your finger nail has a hardness of 2-2.5-A copper penny has a hardness of 3.5 -A iron nail has a hardness of 4.5 -Glass has a hardness of 5.5 -Minerals that are harder can SCRATCH other softer minerals
Bellwork 11-4-13Obj: SWBAT explain the properties that are used in
classifying minerals and apply the hardness test.
1. Is Jell-O a mineral? What classifies a mineral?
2. What are the 5 properties of minerals we have taken notes on, explain each.
#1 on the hardness scale-Talc and graphite have a hardness
of one.
#2 on the hardness scale
-Gypsum has a hardness of 2
-Gypsum is used for drywall (sheetrock)
#3 on the hardness scale
-Calcite and Native Copper have a hardness of 3.
-Calcite is used to make concrete!
#4 on the hardness scale-Fluorite has a hardness of 4
Fluorite is used to make the active ingredient in toothpaste (NaF)
#5 on the hardness scale-Apatite and hematite have a
hardness of 5
Hematite beads Your teeth are made of hydroxyl apatite!
#6 on the hardness scale-Feldspar and Pyrite have a
hardness of 6
*Chalcopyrite is an important ore of Copper
#7 on the hardness scaleQuartz has a hardness of 7, and is
used to make glass, watches, lasers, abrasives, and many other things!
#8 on the hardness scale
Topaz has a hardness of 8
Topaz occurs in many colors and is used as a gemstone (Novembers birthstone)
#9 on the hardness scale
Corundum has a hardness of 9.Corundum is the gemstone ruby and sapphire, it is also used to make sandpaper and abrasives
#10 on the hardness scale
-Diamond is the ONLY mineral to have a hardness of 10.