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Physical and Chemical Change

Physical and Chemical Change. Physical change . Physical change— a change in the way matter looks. N o new matter is created. Alters a matter’s appearance without changing the matter. Can affect the size, shape, and state of matter. The matter stays the same. Can often be reversed.

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Physical and Chemical Change

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  1. Physical and Chemical Change

  2. Physical change • Physical change— a change in the way matter looks. • No new matter is created. • Alters a matter’s appearance without changing the matter. • Can affect the size, shape, and state of matter. • The matter stays the same. • Can often be reversed.

  3. States of matter can change in a physical change • http://www.harcourtschool.com/activity/states_of_matter/

  4. Examples • Breaking glass • Melting ice • Cutting paper

  5. More examples • Sawing wood • Evaporating puddle • Freezing juice

  6. Chemical Change • Chemical change— a change in matter in which one or more new substances are created. • A new matter is made. • Difficult to reverse.

  7. How do I know a chemical change has happened? • Color change • Smell

  8. How do I know a chemical change has happened? • New matter created • Gas created • Heat or light created

  9. Examples • Toast burning • Rocket fuel burning • Metal rusting

  10. More examples • Cake baking • Leaves changing color • Rotting bananans

  11. Chemical and Physical Change Lab • http://vital.cs.ohiou.edu/steamwebsite/downloads/ChangeLab.swf

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