1. Physical and Chemical Changes

2. What is a Physical Change?
A physical change alters the form of a substance, but does not change it to another substance
In most cases, it can be reversed.
Example:
Melting ice
Cutting paper

3. What is a Chemical Change?
When a substance undergoes a chemical change, it is changed into a different substance with different properties. (irreversible)
Example:
Baking a Cake
Rusty nail

4. 5 Signs of a Chemical Change
Color Change
Precipitation

5. 5 Signs of a Chemical Change
Gas Production
Temperature Change

6. 5 Signs of a Chemical Change
Changes in Characteristic Properties (odor, light given off)

7. Chemical or Physical Change?
Toast burning?
Chemical

8. Chemical or Physical Change?
Rocket fuel burning?
Chemical

9. Chemical or Physical Change?
Sawing wood?
Physical

10. Chemical or Physical Change?
Metal rusting?
Chemical

11. Chemical or Physical Change?
Disappearing puddle?
Physical