6th grade ch. 3 sec. 2 properties of magma
TRANSCRIPT
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Ch. 3 Sec. 2 Ch. 3 Sec. 2 Properties of MagmaProperties of Magma
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element
• substance that cannot be broken down into other substances
• ex: carbon, hydrogen
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compound
• substance made of 2 or more elements that have been chemically combined
• ex: water, carbon dioxide
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physical property
• any characteristic of a substance that can be observed or measured w/out changing composition of substance
• ex: freezing point
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chemical property• property that
produces change in composition of matter
• ex: ability to burn
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viscosity• physical property
• resistance of liquid to flowing
• greater viscosity-slower it flows
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Question: How Fast do Liquids Flow?• Hypothesis: I predict that ____________ • Procedure: See page 87
Liquid Time Flowed-Fast or slow/
ViscosityHoney 98 sec Slow-greater
viscosity-highVegetable Oil 53 sec fast-lower
viscosity-low
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low viscosity
high viscosity
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high viscosity
low viscosity
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high viscosity
low viscosity
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viscosity of magma
• depends on silica content & temp.
• silica= oxygen + silicon
• more silica higher viscosity
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pahoehoe• fast-moving, hot lava• low viscosity• looks like solid mass of wrinkles,
billows & ropelike coils
http://www.youtube.com/watch?v=0jry-iMXjik
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aaaa
aa surge
• cooler & slower than pahoehoe
• hardens into rough chunks
http://www.youtube.com/watch?v=iyIV5fd1Aww
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How are pahoehoe and aa different?
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The viscosity of magma depends
on what two factors?
1. silica content
2. temperature
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compound
• substance made of 2 or more elements that have been chemically combined
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element
• substance that cannot be broken down into other substances
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chemical property or physical property?
•ability to burn
chemical property
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low viscosity
high viscosity
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high viscosity
low viscosity
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high viscosity
low viscosity