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II. Section 2 Properties of Magma. A. Physical and Chemical Properties. Element- substance that cannot be broken down into other substances Compound- a substance that is made of two or more elements
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A. Physical and ChemicalProperties • Element- substance thatcannotbebroken down intoother substances • Compound- a substance thatis made of two or more elements • Physicalproperty-canbeobserved and measuredwithoutchanging the composition of the substance
5. Density, hardness, melting point, boiling point, magnetism 6. ChemicalProperties-propertythatproduces a change in the composition of matter 7. Burnablility, reactionwithother substances
B. What Is Viscosity? • The resistance of a liquid to flow • The greater the viscosity, the sloweritflows, the lower the fasteritflows • Greater friction, greaterviscosity
C. Viscosity of Magma • Silica-oxygen, silicon • More silica the more viscosity, light color • lesssilica, lessviscosity, darkcolor
4. Temperature- Viscosity increases as temperature decreases (Honey) 5. Pahoehoe- fast moving, hot lava, low viscosity 6. Aa- higher viscosity, slower, cooler