1. Physical Change vs. Chemical Change Pg. E-22

2. Physical Change A change in which matter looks different but is still the same matter A change that affects the size, shape or color of a substance but does not affect its composition

3. Examples of Physical ChangePhysical Change Cutting paper Mashing potatoes Painting a wall Breaking glass Melting marshmallows Molding clay Water freezing Water boiling Thawing meat

4. Chemical Change A change that results in the formation of a new substance A change that is permanent in nature A change in materials that produces a new substance; the change is permanent

5. Examples of Chemical ChangesChemical Changes –Wood burning to ash and smoke (a new substance is formed) –Iron rusting –Marshmallows burning –Apple rotting –Toasting bread

6. Raw Egg Becomes Cooked Egg

7. Cake Mix Becomes Cake

8. Newspaper to Ash

9. What’s the Difference? With a physical change, the item can be change back to its original form With a chemical change, the item cannot be changed back to its original form