1. Physical Change A process by which no change in composition occurs
Ie: there is a change to another phase (i.e. gas, liquid, solid) or separated or combined.
Physical changes are generally easy to reverse.
No energy is produced by the substance.

2. Chemical Change A chemical reaction
Display different physical and chemical properties after the change
Changes are not reversible without another reaction.
Energy is often produced ( fire or heat, for example).

3. Physical or Chemical Change?
Substance changes shape
Foaming
Heat
Dissolving
Production of sound
Color changes
Chemical
Chemical
Physical
Chemical
Physical and Chemical