2. Physical and Chemical Properties …21
Physical Properties
Chemical Properties
Chemical Change
Physical Change

3. Chemical and Physical Changes Brain pop

4. Physical Properties Ex. Density
mass
state of matter (solid, liquid, gas)
solubility –dissolve
Boiling point
can be observed or measured without changing the substance.

5. Physical Change
a change that occurs that does not change the identity of the substance
Can be reversed
Ex.
Cutting your hair
Melting
Chewing your food

6. Chemical Properties React with air, acid or water
Flammability
Corrosion
Any characteristic that gives a substance the ability to undergo a change

7. Chemical Change
a change that occurs causing the identity of the substance to change
Can’t be reversed
Ex.
Spoiling milk
Rusting a car
Digesting food

8. Is it Physical or Chemical?
Change
Physical
Chemical
Melting cheese
Burning charcoal
Meat spoiling
Wadding up paper
Fence rusting 8

9. Chemical Reactions…back of 21
Examples of Chemical Reactions
Baking soda and vinegar
Alka seltzer and water

10. Signs of a chemical change Produces light Produces heat
Creates a gas(bubbles)
Color change
Formation of a precipitate (solid, gel, powder) 10