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

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
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