6th Grade Ch. 3 Sec. 2 Properties of Magma

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  • 1. Ch. 3 Sec. 2 Properties of Magma
  • 2. element
    • substance that cannot be broken down into other substances
    • ex: carbon, hydrogen
  • 3. compound
    • substance made of 2 or more elements that have been chemically combined
    • ex: water, carbon dioxide
  • 4. physical property
    • any characteristic of a substance that can be observed or measured w/out changing composition of substance
    • ex: freezing point
  • 5. chemical property
    • property that produces change in composition of matter
    • ex: ability to burn
  • 6. viscosity
    • physical property
    • resistance of liquid to flowing
    • greater viscosity-slower it flows
  • 7. Question: How Fast do Liquids Flow?
    • Hypothesis: I predict that ____________
    • Procedure: See page 87
    fast-lower viscosity-low 53 sec Vegetable Oil Slow-greater viscosity-high 98 sec Honey Flowed-Fast or slow/ Viscosity Time Liquid
  • 8. low viscosity high viscosity
  • 9. low viscosity high viscosity
  • 10. low viscosity high viscosity
  • 11. viscosity of magma
    • depends on silica content & temp.
    • silica = oxygen + silicon
    • more silica  higher viscosity
  • 12. pahoehoe
    • fast-moving, hot lava
    • low viscosity
    • looks like solid mass of wrinkles, billows & ropelike coils
    http://www.youtube.com/watch?v=0jry-iMXjik
  • 13. aa aa surge
    • cooler & slower than pahoehoe
    • hardens into rough chunks
    http://www.youtube.com/watch?v=iyIV5fd1Aww
  • 14.  
  • 15. How are pahoehoe and aa different?
  • 16. The viscosity of magma depends on what two factors?
    • silica content
    • temperature
  • 17. compound
    • substance made of 2 or more elements that have been chemically combined
  • 18. element
    • substance that cannot be broken down into other substances
  • 19. chemical property or physical property?
    • ability to burn
    chemical property
  • 20. low viscosity high viscosity
  • 21. low viscosity high viscosity
  • 22. low viscosity high viscosity