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Bellwork 10-28-13. Obj : SWBAT explain the properties that are used in classify minerals. What comes to mind when you see this picture? 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

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Bellwork 10-28-13

  • Obj: SWBAT explain the properties that are used in classify minerals.

  • What comes to mind when you see this picture?

  • 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. Cannotbe organic

  • What does that mean?

  • 5. Have a defined crystalline structure


How do we id a mineral
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 mineral1
How do we ID a mineral?

Scientists use mineral properties to ID minerals,Some of these properties include:

Color

Streak

Cleavage

  • Luster

  • Hardness


Mineral c o l o r
Mineral Color

Describe the color of the mineral

Azurite is blue

Corundum (ruby) is red


Mineral streak
MineralStreak

Describe the color of the streak on a piece of porcelain.

Hematite has a RED streak


Mineral cleavage
Mineral Cleavage

  • Cleavage is the tendency of a mineral to cleave, or break, along flat, even surfaces.

  • Gypsum has ONE plane of cleavage

  • Salt has CUBIC cleavage


Mineral luster
MineralLuster

  • Luster is used to describe how light is reflected from the surface of a mineral.

Luster can be:

Metallic

Earthy

Glassy


Mineral hardness
MineralHARDNESS

  • Hardness 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

  • -Acopper penny has a hardness of 3.5

  • -A iron nailhas a hardness of 4.5

  • -Glass has a hardness of 5.5

  • -Minerals that are harder can SCRATCH other softer minerals


Bellwork 11 4 13
Bellwork 11-4-13

Obj: SWBAT explain the properties that are used in classifying minerals and apply the hardness test.

  • Is Jell-O a mineral? What classifies a mineral?

  • What are the 5 properties of minerals we have taken notes on, explain each.


Mineral properties
Mineral Properties:

The Hardness scale

1

10

Diamond

Talc


1 on the hardness scale
#1 on the hardness scale

-Talcand graphite have a hardness of one.


2 on the hardness scale
#2 on the hardness scale

-Gypsum has a hardness of 2

-Gypsum is used for drywall (sheetrock)


3 on the hardness scale
#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
#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
#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
#6 on the hardness scale

-Feldspar and Pyrite have a hardness of 6

*Chalcopyrite is an important ore of Copper


7 on the hardness scale
#7 on the hardness scale

Quartz has a hardness of 7, and is used to make glass, watches, lasers, abrasives, and many other things!


8 on the hardness scale
#8 on the hardness scale

Topaz occurs in many colors and is used as a gemstone (Novembers birthstone)

Topaz has a hardness of 8


9 on the hardness scale
#9 on the hardness scale

Corundum has a hardness of 9.

Corundumis the gemstone ruby and sapphire, it is also used to make sandpaper and abrasives


10 on the hardness scale
#10 on the hardness scale

-Diamond is the ONLY mineral to have a hardness of 10.


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