1. Chemical and Physical Properties

2. Physical Change A change in the physical property of a substance
The chemical properties remain the same
Ex: ice to water, carving wood…

3. Any characteristic that can be observed or measured is a physical property.
                   Length can be measured.

4. Physical Physical Properties Physical Changes
Def: Properties that can be seen without changing the identity of the substance.
Ex: color, shape, hardness, odor, density, dissolvability, mass, weight, volume, texture
Def: changes from one phase to another (solid, liquid, gas),
without changing the substance
Ex:
Chopping, slicing, sawing, grinding, dissolving
Melting/ Freezing
Vaporizing (Boiling)
Condensation
Sublimation
Evaporation

5. Chemical Change A substance is transformed into a new substance
Involves a chemical reaction
Ex. Iron rusting (with oxygen) to form iron oxide, chemical explosions, burning of wood

6. Signs of a Chemical Change
Signs of a chemical change include the production of bubbles, heat, light, smoke, sounds or color changes.
Chemical changes are not reversible using physical means.

7. Example Chemical Reaction
Before
During (fire, smoke)
After change

8. Chemical Chemical Changes Chemical Properties
Def: The process by which a substance changes to a new substance
Ex:
Combustion (burning)
Respiration
Digestion
Leaves changing color
Rusting
Photosynthesis
Baking/cooking
Gasoline burning
Alka seltzer in water reacting
Def: Properties that describe how a substance changes into a new substance
Ex: flammability (burning)

9. Properties Physical Properties Chemical Properties
Def: Properties that can be seen without changing the identity of the substance.
Ex: color, shape, hardness, odor, density, solubility (how well a solid dissolves), mass, weight, volume, texture
Def: Properties that describe how a substance changes into a new substance
Ex: flammability (burning)