lesson 1 minerals and rocks notes
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Powerpoint presentation used for the note section of a rocks and minerals unitTRANSCRIPT
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Minerals and Rocks
Understanding the Rock Cycle
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What are minerals?
• All rocks are composed of minerals
• Minerals are naturally occurring, nonliving substances found on Earth.
• There are about 3500 known minerals
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About 20 minerals make up more than 95% of all of the rocks in the Earth’s crust
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Chemical Composition
Minerals have a definite chemical composition and structure
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Metamorphic Rock
Igneous Rock
Sedimentary Rock
Heat and pressure
Melting
Deposition, Lithification and cementation
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How do minerals make rocks?New rocks are formed from volcanoes
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Igneous RocksMolten rocks cool and solidify to form igneous rocks
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What happens over time?
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Sedimentary Rocks
• Sedimentary rocks are composed of the remains of older rocks and organisms.
• It is in these rocks that we find fossils
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How are they formed?
The process of sediments being laid down
The process of particles and minerals layering and joining together to become one rock type
Check out the link
Check out the link
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What do they look like?
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Metamorphic Rocks
• Metamorphic rocks can be formed from any other type of rock
• The similarities are often uncanny…its just a little change
• But How???
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It is metamorphosed
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A little pressure and you’ll fold up like a metamorphic rock
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Metamorphic Rock
Igneous Rock
Sedimentary Rock
Heat and pressure
Melting
Deposition, Lithification and cementation