Physical and Chemical Change

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Presentation transcript:

Physical and Chemical Change

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.

States of matter can change in a physical change

Examples Breaking glass Melting ice Cutting paper

More examples Sawing wood Evaporating puddle Freezing juice

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.

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

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

Examples Toast burning Rocket fuel burning Metal rusting

More examples Cake baking Leaves changing color Rotting bananans

Chemical and Physical Change Lab http://vital.cs.ohiou.edu/steamwebsite/downloa ds/ChangeLab.swf