1. Physical & Chemical Changes

2. Physical Change

3. Atoms do not rearrange (switch partners)
Only physical properties change. Chemical properties do not change
Physical changes are generally easy to reverse
No energy is produced by the substance.

4. Chemical Change

5. Atoms are rearranged into different molecules
Atoms are rearranged into different molecules. There will be a new chemical formula
Both physical and chemical properties are changed
Changes are not reversible without another reaction
Energy is often produced ( fire or heat, for example)

6. Fizzing/Foaming & Sound

7. Color Change

8. Heat or Light

9. Odor

10. Physical vs. Chemical
Physical change is like printing the same word in a different style of type:
stampedes stampedes
Chemical change, or chemical reaction, is like scrambling the letters of a word to make new words:
stampedes made + steps

11. Open book to pg. 599