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Transcript

  • 1. Physical Properties Any characteristic that can be observed or measured without changing the substances composition
  • 2. Physical Properties Include
    • Viscosity
    • Conductivity
    • Malleability
    • Hardness
    • Melting point
    • Boiling point
    • Density
  • 3. Viscosity
    • A measure of a liquids resistance to flow.
    • (High viscosity = Thick)
  • 4. Conductivity
    • The ability of a material that allows heat or electricity to flow through it
  • 5. Malleability
    • The ability of a metal to bend and not break.
    • (ability to be hammered)
  • 6. Melting and boiling points
    • Melting point is the temperature where a solid becomes a liquid
    • (water=0 degrees C)
    • Boiling point is the temperature where a liquid becomes a gas
    • (water=100 degrees C)
  • 7. Density
    • Density is the ratio of the mass of a substance to its volume.
    • Density can be used to identify substances-
    • The density of a pure substance always remains the same
  • 8. Using Physical Properties
    • Identifying materials
      • Decide properties to test
      • Compare results with known data
    • Properties determine which materials are chosen for specific uses
  • 9. Separating mixtures
    • Filtration and Distillation
    • Filtration separates particles by size
    • Distillation separates solutions based on boiling points
  • 10. Physical Changes
    • Properties change but the substance remains the same
    • Changing from a liquid to a gas
    • Crumbling paper
    • Slicing a tomato