1. Properties of Matter
When scientists study and observe matter, they describe matter with physical and chemical properties.

2. What is a property?
Property: a characteristic of a substance that can be observed

3. Chemical Properties
Chemical property: a property that can only be observed by changing the identity of the substance
Examples:
Flammability – the ability to catch on fire
Oxidation – the ability to rust
Reactivity – the ability to have a chemical reaction

4. Physical Properties
Physical property: a property that can be observed without changing the identity of the substance.
Examples:
luster
malleability
ductility
density
melting point
boiling point
solubility
specific heat

5. Physical Properties Luster – the shininess of an object
Malleability – the ability to be hammered into a thin sheet
Ductility – the ability to be stretched into a thin wire

6. Physical Properties
Melting point: the temperature at which a substance changes from a solid to a liquid at a given pressure
The melting point of water = 0oC
Boiling point: the temperature at which a substance changes from a liquid to a gas at a given pressure
The boiling point of water = 100oC

7. Physical Properties Density - the amount of mass per unit of volume.
Solubility – the ability for a
substance to dissolve.
Specific Heat – the amount of energy required to raise the temperature 1oC

8. Examples: Think/Pair/Share
Look at the examples on the back of your paper and decide if they are physical or chemical properties.
Think (3 min) – Answer individually
Pair (2 min) – Discuss with your table mate
Share (1 min) – Go over as a class