Properties of Matter
Physical Properties 
The characteristics of a substance that can be observed without changing the identity of the substance.
Density
A measure of the amount of matter present in a given volume of a substance.
Physical Change
A change in any physical property of a substance, not in the substance itself.
Chemical Properties
Describes how substances can form new substances.
Chemical Change
The change of one substance into another substance.
Physical Change
A change in any physical property of a substance.
Melting
The process by which a solid becomes a liquid
Melting Point
The lowest temperature at which a substance begins to melt.
Freezing
The process by which a liquid becomes a solid.
Freezing Point
The temperature at which a specific liquid becomes a solid.
Evaporation
A process by which a liquid becomes a gas.
Sublimation
When a solid changes directly to a gas.
Boiling
A process by which a liquid becomes a gas.
Boiling Point
The temperature at which a substance boils.
Condensation
The process by which a gas changes its state to become a liquid.