1. Be ready to look at your quiz from Friday.
Bell work
Be ready to look at your quiz from Friday.

2. Physical or Chemical Changes SPI 0807.9.8
Success Criteria:
I can tell the difference between a chemical and physical change.
TOC:
#10. Physical or Chemical Changes notes

3. Physical or chemical change Brainpop

4. Physical Changes
A change of matter from one form to another without a change in chemical properties.
Changes the appearance of an object, but
does not change the composition of the object.
In other words, the way it looks is changed, but what it is does not change. (kind of like dressing up for a costume party)
Physical changes do not form new substances.
Can be fairly easily undone or reversed

5. Physical Changes: changes the appearance of an object, but does not actually change the composition of the object
Physical Changes DO NOT Form New Substances
Physical Changes
Two Examples

6. H2O H2O H2O Physical Change:
It looks different, but is still the same material.
No chemical reaction has occurred.
Example: Changes of state/phase ARE NOT chemical reactions
In other words, liquid to solid to gas are only physical changes
Water Vapor
Liquid Water
Solid Water
H2O
H2O
H2O

7. Examples of Physical Change Melting Freezing Boiling Cutting Crushing
Tearing
Breaking
Smashing
Dissolving
In every example here, the appearance is changed, but the composition remains the same.
No Chemical Change!

8. Physical Change Examples
For each of these examples, the appearance is changed, but the composition remains the same.
Melting
Freezing
No Chemical Change!
Boiling

9. Physical Change Examples
Cutting
For each of these examples, the appearance is changed, but the composition remains the same.
Crushing
No Chemical Change!
Tearing

10. Physical Change Examples
Breaking
For each of these examples, the appearance is changed, but the composition remains the same.
Smashing
No Chemical Change!
Dissolving

11. Chemical Change
Is the result of a chemical reaction & a new substance is formed
Can not be easily undone or reversed
Some Chemical Change Indicators
There may be a change in odor
Heat may be given off
It may explode
It may fizz, foam , flash, or flame
Sound may be heard (snap, crackle, pop, sizzle, bang, boom)
Light may be given off
It may change color
Also, it may form a solid substance called a precipitate

12. Stand up, do 10 jumping jacks, then high five one of your neighbors.
Brain Break!
Stand up, do 10 jumping jacks, then high five one of your neighbors.

13. Chemical Change Example
Iron and oxygen react to form a compound called iron oxide.
Color Change: From silvery-gray to red-orange-brown
1966 VW Beetle
Bare Metal-No Paint
1966 VW Beetle
Rusting away
Chemical Equation
Fe + 3O FeO3

14. Chemical Change Example
Copper + oxygen react to form a compound called copper oxide.
Color Change: From golden-brown to aqua-marine green
Statue of Liberty
Original look-1886
Statue of Liberty
Modern look-2014
Also Called Rust
Chemical Equation
4Cu + O Cu2O

15. Chemical Change Example 10Al + 6NH4ClO4 4Al2O3 + 2AlCl3 + 12H2O + 3N2
The Space Shuttle used solid rocket propellant called APCP
Space Shuttle (USA)
Lift Off
Chemical Equation
10Al + 6NH4ClO Al2O3 + 2AlCl H2O + 3N2

16. Chemical Change Example 3NaHCO3 + C6H8O7 Na3C6H5O7 + 3CO2 + 3H2O
Upset stomach? You can take Alka Seltzer effervescent tablets
Chemical Equation
3NaHCO3 + C6H8O Na3C6H5O CO H2O

17. Chemical Change Example
Soured milk is the result of a chemical reaction
Chemical Equation
C12H22O11 + H2O C3H6O3

23. Get with your Same Group Partner
Get with your Same Group Partner. Discuss and write down your choice on a desk.
Physical or chemical online quiz