1. Classification of Matter
SN# 12
Physical Properties and Changes

2. The BIG Idea
Matter has physical properties that can be changed by physical and chemical processes

3. Matter has PHYSICAL PROPERTIES
Physical Properties are characteristics of a substance that can be observed without changing the identity of the substance.
What are a few physical properties of matter?
Color - Volume
Shape - Density
Size - Mass
Texture

4. Physical Changes
Physical Changes: a change in some physical property that does not result in the object changing into another substance.

5. Physical Changes Physical Change: NO new substance is formed.
These changes are easily reversible or temporary.
All States of Matter Changes are physical changes

6. Physical Changes EXAMPLES Salt dissolving in water
Melting, Boiling, Freezing
Mixing 2 solids
Crushing
Breaking
Cutting

7. Classification of Matter
SN# 13
Chemical Properties and Changes

8. Matter has CHEMICAL PROPERTIES
Chemical Properties describe how substances can form new substances
Can only be observed as a substance changes into something new.

9. Chemical Changes
Chemical Change: occurs when atoms are rearranged to form a new substance with different properties.
A NEW substance is formed.
These changes are irreversible or permanent.

10. SIGNS OF A CHEMICAL CHANGE
Chemical Changes
SIGNS OF A CHEMICAL CHANGE
Heat
Light
Bubbles
Odor
Smoke

11. Chemical Changes Flammability: ability to burn
Reactivity: how easily a substance combines with another chemically
EXAMPLES
Digestion
Respiration
Burning
Photosynthesis
Decomposition