rocks rock!
TRANSCRIPT
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Thursday, August 18th Write Down Homework
Take out HW (mineral search)
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Table of Contents
Date: 8/18
Section: Minerals
Title: Minerals in the House
Pages3
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Mineral Search
What’d you learn?
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Place Rock Cycle Tiers in front of
table of contents!!!!
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Pick your Tiers!Put your name on the index card Write down your tier 1 pick for igneous Write down your tier 1 pick for
sedimentaryWrite down your tier 1 pick for
metamorphicWrite down your tier 2 pick for igneousWrite down your tier 2 pick for M/SWrite down your tier 3 pick
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Rocks Rock!
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Table of contents
Date: 8/18
Section: I rocks
Title: Rock Classification and Igneous
Page: 4
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Before we look at rocks, let’s review the characteristics of minerals.
Characteristics Naturally occurringDefinite crystalline structureDefinite chemical compositionSolidInorganic*Used for building materials, gemstones, health supplements, toothpaste, medical, baby powder, etc.
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What do you know about rocks?
Do you agree with these statements?
Rocks are hard.Rocks are solid.Rocks are natural.Rocks are made of minerals.
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Rocks are hard.
Not always…Some rocks are soft and can be
scratched with your fingernail (shale, gypsum)
Other rocks are soft until they are exposed to air, or visa versa.
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Rocks are solid.
Not always…Some rocks
contain water in pores.
Geodes hold water and minerals inside.
Some igneous rocks are threaded or have fine meshwork, like Pele’s hair.
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Rocks are natural.
Not always…Consider everything that humans
make.
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Rocks are made of minerals.Not always…Remember that minerals are
made of inorganic material.What about coal? What about
coquina?What about obsidian?
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So what are rocks
then???
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ROCK TYPE
S
IGNEOUS
METAMORPHIC
SEDIMENTARY
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I. What is a Rock?• Rocks are naturally occurring solid material made from one or more minerals.•Rocks are classified based on the way they were formed.•Three types of Rocks:
• Igneous – form when hot, liquid rock, or magma, cools and solidifies
• Sedimentary – formed by particles that have been carried or deposited and then compacted and cemented together.
• Metamorphic – rocks formed from chemical reactions one rock forms into another kind over long periods of time.
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Igneous RocksIgneous rocks are classified
according to their composition and texture.
4 basic types of textures◦Glassy – black and sharp◦Fine grained – interlocking pieces◦Coarse grained – consist of
interlocking mineral crystals◦Porphyritic – made of large crystals
scattered on the back of small crystals.
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Igneous Rock Formations
1.Extrusive – rock formed from lava2.Intrusive – rock formed when magma
forces its way upward into preexisting rocks then hardens
Magma – molten material below the earth’s surface.Lava – molten material above the earth’s surface.
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Tier 1 Worktime
You may use…..
The textbook
Notes
Internet sources at home!