1. Physical and Chemical Properties and Changes

2. Catalyst (10 min)
Write down the answers to the following questions on a piece of notebook paper. This will be collected at the end of class for part of your daily grade
How do you decide whether a sample of matter is a solid, liquid or gas (describe in terms of shape, volume, compressibility and particles)
How is a solid similar to a liquid?
How is a liquid similar to a gas?
Assemble flip book (see sample at the front of the room)

3. Objectives
SWBAT distinguish between the physical properties and chemical properties of matter
SWBAT describe physical and chemical changes and classify changes of matter as physical or chemical

4. Agenda
I do: lecture and frayer notes
We do: distinguish between physical and chemical properties and changes on white boards
You do: work with partners and classify the changes and properties of different substances

5. Characteristic(s)/Fact(s)
Definition
        Characteristic(s)/Fact(s)
Example(s)
Vocabulary Word
                         Illustration

6. Physical Property Definition:
A characteristic that can be observed or measured without changing the sample’s composition
Characteristics:
Describes the substance itself
Can be determined by viewing, touching or measuring the substance

7. Physical Property Examples: Melting/boiling point Density
Electrical and heat conductivity
Color
Size or mass
Luster (shine)
Odor
Hardness or Brittleness
Temperature

8. Intensive vs. extensive physical property
Intensive properties:
Independent of the amount of substance present
Extensive properties:
Dependent upon the amount of substance present

9. chemical Property Definition:
Ability of a substance to combine with or change into one or more other substances
Characteristics:
Cannot be determined just by viewing or touching the substance
Internal structure of the substance must be changed to observe the property

10. Chemical Property Examples: Chemical stability Flammability
How easily it reacts with other substances

11. Physical Change Definition:
Changes which alter a substance’s physical appearance but the composition remains unchanged
Characteristics:
Can involve a change of state
Does not change what the substance is

12. Physical Change Examples: Hair cut
Boiling, freezing or melting a substance
Sugar cube dissolving

13. chemical Change Definition:
Change in which a substance is transformed to one or more new substances with altered compositions
Characteristics:
Involves a chemical reaction
Changes color, smell, energy, formation of gas, precipitate and/or light

14. Observable factors of a chemical Change

15. Chemical Change Examples: Fireworks Burning coal Iron rusting
Scientist breaking water into oxygen and hydrogen gas

16. Physical vs. chemical change
Physical Change
Chemical Change
Does not involve changes in identity of a substance
Change the identity of the substance
Cause a change in state or shape
Involves a chemical reaction, Causes a change on a molecular level
Sometimes reversible
Not reversible
Does not yield a product
Produce gases, solids, liquids, energy and color changes

17. Mercury oxide -> oxygen + Mercury

18. WE Do: Grab a white board for your group

19. Identify whether the following are physical or chemical changes and use your notes to explain why

20. Lighting a match

21. Crushing aluminum cans

22. Digesting food

23. Two cans of paint mixed together

24. Using hot glue

25. Mixing baking soda and vinegar

26. Water freezing and forming ice

27. Identify whether the following are physical or chemical properties and use your notes to explain why

28. Silver tarnishes when it comes in contact with hydrogen sulfide in the air

29. A banana is yellow

30. A sheet of copper can be pounded into a bowl

31. Gasoline is flammable

32. An apple will turn brown if left in oxygen

33. Acid in tomato sauce can corrode aluminum foil

34. Barium melts at 725 C

35. A sheet of copper can be pounded into a bowl

36. You do: identify chemical and physical properties and changes
Read the packet and identify the physical and chemical properties and changes of the substance
Make a table to record your answers

37. Homework # 2
Classify the following as chemical change (cc), chemical property (cp), physical change (pc), or physical property (pp). Explain WHY for each answer. 
 Heat conductivity
Length of a metal object
Combustible
Brittleness
Silver tarnishing
Color
Water freezing
Cutting grass
Melting ice
Exploding dynamite
Wood burning
Baking bread
Iron rusting
Density of a coin

38. HOT Question 1
Tyreke made the following statement when speaking to his lab partners: "Breaking a rock into several pieces is an example of a chemical change. When I started, I had one substance (a rock). At the end, I had several different substances (the different sized pebbles).“ Assess the validity of his claim and justify your reasoning.

39. HOT Question 2
Water (H2O) is made of Hydrogen (a gas) and Oxygen (also a gas). Water is a liquid at room temperature. Based on this, it seems like hydrogen and oxygen combining to form water is a physical change (gases turning into solids). Do you agree with this assessment? Why or why not?

40. HOT Question 3
Chlorine is a yellowish gas at room temperature that reacts easily with sodium (a shiny silver metal) to form sodium chloride (NaCl-- table salt). Ingesting either chlorine or sodium alone will kill you. Ingesting table salt alone will just make you thirsty. Using your knowledge of physical and chemical changes, discuss whether you believe the formation of NaCl is more of a physical change or a chemical change.