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Reviewing Physical Properties and Changes

Reviewing Physical Properties and Changes. Physical Properties can be observed without changing the substance. color. f reezing point. odor. brittleness. texture. malleability. density. ductility. luster. state of matter. b oiling point. conductivity. taste. hardness.

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Reviewing Physical Properties and Changes

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  1. Reviewing Physical Properties and Changes

  2. Physical Properties can be observed without changing the substance

  3. color freezing point odor brittleness texture malleability density ductility luster state of matter boiling point conductivity taste hardness melting point

  4. A physical change occurs when the appearance of a substance changes, but chemically the substance is the same

  5. Molding a clay ball evaporation (liquid to gas) freezing (liquid to solid) dissolving tearing boiling water Size / shape change melting (solid to liquid)

  6. Chemical Properties

  7. describe the potential of substances to undergo chemical changes…

  8. which depends on how easily it will lose or gain electrons

  9. You can’t actually tell what chemical properties a substance has unless it goes through a chemical change or reaction…

  10. Chemical Changes

  11. Chemical Change occurs when a chemical reaction takes place

  12. The substances created during a chemical reaction are completely different from the original substances!!

  13. The object becomes a whole new material… with NEW and DIFFERENT properties

  14. EXAMPLES: Rusting Burning Cooking

  15. 1. A solid precipitate forms 5 INDICATORS OF A CHEMICAL REACTION: Liquid B Liquid A

  16. 2. Heat or light is produced

  17. 3. Heat absorbed

  18. 4. Gas is produced

  19. 5. Color change occurs

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