1. CPs & NCPs: Changes to Matter

2. Review: Characteristic Properties
A characteristic property is a physical or chemical property that is unique to a particular substance. It can be used to identify a substance.

3. Review: Non-Characteristic Properties
A non-characteristic property is a physical or chemical property that is not unique to one particular substance. It could be used to describe many substances

4. Review: Temperatures Freezing Point of Water: 0°C
Melting Point of Ice: 0°C
Boiling Point of Water: 100°C
These are all examples of Physical Changes

5. Physical vs. Chemical Properties and Changes
Physical Properties:
These can be observed or measured without changing the make-up of the matter of the object.
These properties can be used to describe the object.

6. Physical Properties Include:
Appearance
Texture
Color
Odor
Melting point
Boiling point
Density
Solubility

7. Physical Changes
Physical Changes: These are changes that relate to the physical properties.
There is no change to the chemical make-up during a physical change.

8. Examples of Physical Changes
Ice melting
Clay being modeled into a new shape
Butter melting on toast
Paper is cut in half
Water evaporates from the surface of the ocean
A beach ball deflates

9. Chemical Properties Chemical Property:
A chemical property becomes evident during a chemical reaction.
This is because it only becomes apparent when the object is chemically changed.
A chemical property cannot be determined by simply viewing or touching the object

10. Chemical Changes
Chemical changes: These are changes that change the substance or object into something different or new. These changes are also irreversible.

11. Examples of Chemical Changes
Explosion of fireworks
Nail rusts
Bread becomes toast
Milk goes sour
You digest food
Paper on fire

12. The 5 Signs of a Chemical Change
A chemical change has happened if
1) A gas or solid (precipitate) is produced
2) There is a colour change
3) Heat is created or absorbed
4) A light is given off
5) An odour is produced