1. Physical Properties
Properties of Matter

2. Physical Properties
Physical property is a property that can be observed without changing the identity of the substance.
Examples:
viscosity
conductivity
malleability
hardness
melting point
boiling point
density
color

3. Examples of Physical Properties
Viscosity of a substance is its resistance to flow.
Examples: water = low viscosity
honey = high viscosity
Conductivity is a material’s ability to allow heat to flow.
Examples: metal = high conductivity wood = poor conductivity

4. Examples of Physical Properties
Malleability of a substance is its ability to be hammered into a thin sheet
Melting and Boiling points are the temperatures at which a solid becomes a liquid and a liquid becomes a gas.
Density of a substance is its mass compared to its volume.

5. Physical Change It is a physical change if . . .
A change in the appearance, without changing the composition of the material.
Can be reversible, or irreversible
Substance may seem different, but the way the atoms link up is the same.
Or the substance changes phase.
It changes shape or size
It dissolves.
It is a physical change if . . .

6. Chemical Properties
Properties of Matter

7. Chemical Properties
Chemical property is the characteristic of a substance that is observed during a chemical reaction in which the composition of matter changes.
Examples of chemical properties . . .
flammability
reactivity
Material’s ability to burn in the presence of oxygen.
How readily a substance combines chemically with other substances.

8. Chemical Changes
Chemical changes occur when a substance reacts and forms one or more new substances.
You know a chemical change has occurred when . . .
A change in color.
Production of a gas.
Formation of a precipitate.
Change in odour. (smell)

9. What kind of change is it?
physical

10. What kind of change is it?
chemical

11. What kind of change is it?
physical

12. What kind of change is it?
physical

13. What kind of change is it?
chemical

14. What kind of change is it?
physical