1. Physical Properties of MATTER and Changes MATTER can undergo!!
Color
Density
Boiling point
Melting point
Odor
Taste
Solubility
Etc, etc, etc
ANY change in these is a SIGN of a CHEMICAL CHANGE (which is a reaction)!!
You can also use these to IDENTIFY the substance!!

2. Two types of Changes Matter can Undergo
Signs of a Physical Change:
change in state (solidliquidgas or reverse)
change in Size
change in Shape
dissolves (or mixes)
Solid to a liquid

3. Signs of a Chemical Change:
New substance-gas production (bubbles, foaming, etc)
New solid substance-precipitate
Color changes
Odor changes
Temperature changes-hot or cold
Light production