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Physical Properties and Changes

Physical Properties and Changes. Physical Property. A quality or condition of a substance that can be observed or measured without changing the substance’s composition Examples Color Solubility Density Melting or boiling point Odor Hardness. Using Physical Properties.

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Physical Properties and Changes

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  1. Physical Properties and Changes

  2. Physical Property • A quality or condition of a substance that can be observed or measured without changingthe substance’s composition • Examples • Color • Solubility • Density • Melting or boiling point • Odor • Hardness

  3. Using Physical Properties • Mystery substance… • Odorless • Freezes at 0 °C • Melts at 100 °C • Has a density of 1 g/ cm³ • Clear • What is the mystery substance? WATER!

  4. Physical Changes • Matter is altered without altering the chemical composition of the material • Examples: cutting, grinding, bending, freezing, melting, boiling dissolving, condensing, crushing, breaking

  5. Physical Changes: changes between states of matter • Melting – solid to liquid • Freezing – liquid to solid • Vaporization – liquid to gas (evaporation) • Condensation – gas to liquid • Sublimation – solid straight to gas • Crystallization – gas to solid

  6. Conservation: Physical Change • http://video.google.com/videoplay?docid=-40474112520688034&pr=goog-sl

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