minerals minerals touch our lives in hundreds of ways everyday-we could not live without them!
TRANSCRIPT
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Minerals
Minerals touch our lives in hundreds of ways everyday-we
could not live without them!
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We use minerals to
Growing food, tractors, water pipes, electrical wiring, refrigerator, radio, toaster, lamp, light bulbs, sheets, towels, clothing, make up, fireworks, soap and toothpaste, windows; cereal bowls and dishes, glasses and cups, faucets, doorknobs, electronics; cars, trucks, ships, and railroad cars; bricks, tiles, siding, and houses-Every part of our lives depends on minerals.
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We use 2 billion tons of minerals each year in the US. That’s 10 tons of
minerals for every man, woman, & child!
• Minerals must be mined from the Earth.
• But they are nonrenewable resources, so once we use them up, we will have no more to use.
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http://images.search.yahoo.com/r/_ylt=A0PDoYAQPkhSE3EAH86jzbkF;_ylu=X3oDMTBtdXBkbHJyBHNlYwNmcC1hdHRyaWIEc2xrA3J1cmw-/SIG=13obidl20/EXP=1380494992/**http%3a//www.actforclimatejustice.org/2012/11/victory-patriot-coal-to-stop-mountaintop-removal-mining/
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• There are over 3000 minerals.
• The harder a mineral is to find or get out of the Earth, the more expensive it will be.
• Some pure elements make up minerals. Example: gold, platinum.
• Minerals form everywhere.
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How minerals form Through crystallization
of melted materials. (as it cools crystals grow)
Through crystallization of materials dissolved in water. (water evaporates or cools leaving minerals behind)
Generally happens slowly
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To be a mineral,
something must be……
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naturally occurring
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inorganic• It did not come from a living or once living thing
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solid
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Have a crystalline structure• Symmetrical arrangement
of atoms• Atoms determine structure
which determines all properties about the mineral.
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http://electronmicroscopy.org/images/TEM_CrystalAmorphous.png
CrystallineNOT Crystalline
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Mineral Properties
Each mineral has its own unique properties. They are used to
identify the mineral.
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Color
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Luster-ability to reflect light-
metallic nonmetallic
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Density
• A measurement of how tightly packed the atoms are.
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http://images.search.yahoo.com/r/_ylt=A0PDoYBKdEhSDBAAaoSjzbkF;_ylu=X3oDMTBtdXBkbHJyBHNlYwNmcC1hdHRyaWIEc2xrA3J1cmw-/SIG=13adokmpb/EXP=1380508874/**http%3a//www.sd84.k12.id.us/shs/departments/Science/martz/2007_FSem1/PhysSci/Density.htm
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http://www.worldometers.info/img/world_population_density.gif
World Population Density
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Cleavage OR Fracture-
• ability to be split along a flat surface (weaknesses in bonds)
• when they don’t break apart easily.
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Crystal systems-crystal shape, outer appearance, forms
as crystal grows atom by atom.
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HardnessA measurement of
how much a mineral resist being scratched
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StreakThe color of a
minerals powder
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Special Properties
– Fluorescence
– Magnetism– Radioactivity– Reactivity– Conduct
electricity