1. Physical and Chemical Changes
Properties of Matter
Physical and Chemical Changes

2. A distinctive attribute or quality of something An observation
What is a property?
A distinctive attribute or quality of something
An observation

3. Two Types of Properties
There are two types of properties:
Physical Properties
Chemical Properties

4. Physical Properties
Physical properties are properties that you can observe without changing the identity of the material.
For example: A rubber band is stretchy. If you stretch a rubber band, it is still a rubber band.

5. Physical Properties Physical properties are descriptive.
They include the appearance and behavior.
The appearance of the item is how it looks, feels, tastes, as well as any measurable characteristics like mass, volume, etc.
The behavior of an item is going to be how it reacts with certain other things. For instance, metals are usually attracted by magnets.

6. Common Physical Properties
Magnetic
Dense
Color
Size
Shape

7. Physical Change
A change in the size, shape, or phase of matter is known as a physical change.
A physical change is one in which the basic identity of the object does not change!
Another way to look at it is that a physical change is one which you can change back.

8. Common Physical Changes
Physical changes change the appearance of a substance, but the chemical makeup does not change.
Examples of Physical Changes include:
Size
Shape
Phase (solid, liquid, gas)
Dissolving

9. Chemical Properties
A characteristic that indicates it can undergo an chemical change.

10. Common Chemical Properties
Flammability
Reactivity
Rust (Oxidation)

11. Chemical Change The changing of one substance into another.
New substances are produced because of the breaking of chemical bonds.
ONE WHICH YOU CAN’T CHANGE BACK

12. Detecting Chemical Change
A new substance is ALWAYS produced in a chemical change.

13. Chemical Changes
New substances are produced by the making and/or breaking of bonds.

14. Indicators
There are five indicators that help us to know that a chemical change is taking place:
Unexpected Color Change
Energy Transfer
Precipitate Produced
Odor Produced
Gas Produced