in your new notebook, write stand on the 1 st page. your name should also be on the cover of your...
TRANSCRIPT
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In your new notebook, write STAND on the 1st page. Your name should also be on the cover of your notebook!S: ScienceT: Ms HilgefortA: Geology NotebookN: NameD: 2nd 9 weeks
If you need to purchase a new notebook, you can buy one for $1
11.18 Bell Ringer
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Label next 2 pages “Mineral Warm-Ups”
Decide if the following statements are true. If not, correct them. (Take your best guess!)
1. Water and Ice are minerals.2. Minerals can be found in rocks.3. Minerals exist as liquid, gas, and solid.
11.18 Bell Ringer
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Key Terms
Notes
Summary:
Mineral Properties Cornell Notes
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Rock
The material that forms the Earth’s hard surface
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Mineral
A naturally occurring, inorganic solid that has a crystal structure
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Minerals make-up rocks.
They are the building blocks of rocks!
Minerals
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1. Solid1. Cannot be a liquid or a gas
2. Naturally Occurring1. Found in nature, not man-made
3. Inorganic1. Is not alive and never was, non-living
4. Fixed composition1. Has a chemical formula, most are formed from
compounds of two or more elements, some minerals consist of one element ex. Au
5. Crystal Form1. A definite structure in which atoms are arranged
What is a mineral? Properties:
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Inorganic Inorganic: NOT formed from living things or the remains of living things
Organic material: Material that comes from living or once-living things
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ORGANIC! Fruits are grown on trees and are alive until picked!
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ORGANIC. Horses are alive, breathing and active.
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INORGANIC. Rocks are not alive and never were!
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Formed by natural processes (Is not manufactured).Is glass a mineral?Is a diamond a mineral?
Formed in Nature
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Granite- forms when molten rock coolsTalc (used to make baby powder)- forms from
high pressure and heat in the earthHalite- forms when water evaporates in hot,
shallow parts of the ocean (leaving behind the salt it contained).
Formed in Nature
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Has definite volume and shape.
Volume=amount of space an object takes up. Basketball vs. Golf ball
Is water a mineral?Is ice a mineral?
Solid
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Each mineral contains a specific combination (mixture) of atoms of certain elements. Element=A
substance that contains (has) one type of atom.
Has same chemical make up no matter where you break it.
.
Definite (the same) Chemical Composition
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Crystal StructureAtoms are joined in a repeating, 3-D pattern
Each mineral has it’s own crystal structureDiamond and
graphite have same chemical makeup (carbon) but different crystal structures
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Crystal StructureSome are visible
(you can see crystal structure) Diamonds and
quartzSome you need a
microscope to see crystals
7 groups of structures named by shapes and angles formed by imaginary lines through the center
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Is It a Mineral? Classification
Number #1-13. Write the word and classify each picture as
“mineral (M)” or “non-mineral (NM).” If non-mineral, write the property that the object does not
meet.Example: Plastic- NM- Naturally made/ Sulfur- M
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Wood
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Gold
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Fossil
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Topaz
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Bones
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Granite
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Quartz
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Pearls
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Talc
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Icebergs
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Diamond
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Coal
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Rock Salt
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And the answers are…Minerals
a) Gold (2)b) Topaz (4)c) Quartz (7)d) Talc (9)e) Iceberg*
(10)f) Diamonds
(11)
Non-Minerals
a) Wood - Inorganic (1)b) Fossils – Inorganic (3)c) Bone - Inorganic (5)d) Granite – Definite chemical
composition (6)e) Pearls – Inorganic (8)f) Coal - Inorganic (12)g) Rock Salt – Definite chemical
composition (13)According to IMA – ice is listed as a mineral
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A spelunker finds a crystal of a pink substance inside a cave. What 5 properties must this substance meet in order to be considered a mineral? 1. Naturally Occurring2. Inorganic3. Solid4. Definite Chemical Composition5. Crystal Structure
11.19 Bell Ringer
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Look at the following minerals. Which do you think are the same types of minerals and which do you think are different?
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They are examples of quartz!!
These are all the same type of mineral!
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There are over 3000 types of minerals in the Earth’s crust
As you could see with the quartz, often times even the same kind of minerals can look very different
Therefore, geologists (scientists who study minerals and rocks) often use several different tests to determine type of a mineral they have found!
Why Is It So Difficult to Identify Minerals?
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Key Word
Information/Definition
Memory Cue/ Picture
Color
Hardness
Moh’s Hardness Scale
Luster
Streak
Cleavage
Fracture
K.I.M: Mineral Identification
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Color is one of the least reliable tests because a mineral will not always be the same color.The color of a mineral is often caused by tiny
amounts of other elements or compounds inside
For example, what people call amethyst is actually just quartz with iron in it!
Color
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When a mineral is rubbed against a tile, it will leave behind a powdered streak on the tile (colorless, white, etc.)
Sometimes a mineral’s streak does not match the mineral’s external colorFor example, one way to tell
the difference between pyrite (Fool’s gold) and real gold is by streak. Pyrite leaves a greenish-black streak while real gold leaves a yellow streak.
Streak
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The way a mineral shines (metallic, glassy, chalky, silky, pearly)
Metallic - Looks like metal or appears to have metal flakes
Glassy or vitreous - Shines like glassEarthy or chalky - Dull; does not reflect much lightWaxy, silky, or pearly - Has a muted shine; may
resemble shells or pearls
Luster
Metallic Luster
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A measure of how easily a mineral can be scratched
Minerals can only be scratched by other minerals that have the same hardness or are harder
Hardness
This gray mineral is bring scratched by the clear/white mineral; therefore, the clear/white mineral is harder than the gray mineral
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Scale used to rate how hard a mineral is (1=softest-Talc, 10=hardest- Diamond).
Fingernail- 2Steel file-6.5
Mohs scaleHardn
essMineral
Associations and Uses
1 Talc Talcum powder.
2 Gypsum
Plaster of paris. Gypsum is formed when seawater evaporates from the Earth’s surface.
3 Calcite
Limestone and most shells contain calcite.
4 Fluorite
Fluorine in fluorite prevents tooth decay.
5 Apatite
When you are hungry you have a big "appetite".
6 Orthoclase
Orthoclase is a feldspar, and in German, "feld" means "field".
7 Quartz
8 Topaz The November birthstone. Emerald and aquamarine are varieties of beryl with a hardness of 8.
9 Corundum
Sapphire and ruby are varieties of corundum. Twice as hard as topaz.
10 Diamond
Used in jewelry and cutting tools. Four times as hard as corundum.
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Minerals that break along smoother flat planes are said to have cleavage.
Cleavage
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Minerals that break with rough or jagged edges are said to have fracture
Fracture
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Some minerals have unique propertiesFor example, Iceland spar can create double
images
Calcite reacts with hydrochloric acid and releases carbon dioxide (bubbles)
Fluorescence property- glow when they are exposed to ultraviolet light
Some Other Special Properties
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Suppose you find a yellow piece of metal in a stream. How could you tell if it is real gold?
In the city a street peddler offers to sell you a diamond ring for thirty bucks. How could you test if the rock in the ring is a real diamond?
11.20 Bell Ringer
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Mineral Identification LabMineral Gizmo
Stations
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Identifying Minerals Lab
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With your table partner, answer the questions on the “Mineral Mystery” lab using the mystery mineral that your teacher gives you.
Use the Mineral Key on the back to determine which mineral you are examining to answer #6 and #13.
Lab Directions
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Word DescriptionLuster Color of Powder
Streak Rough, jagged
Cleavage Smooth, flat
Fracture Shines
Color Not reliable
1. Match the definition to the word
Inorganic Organic Solid Liquid Gas
Artificial Natural Made of same
elements throughout
Made of Rocks
Crystal Structure
Mineral Review
2. Write down the words below that describe properties of minerals