1. Today you will need:
1. Pencil,
2. Colored Pencils, Highlighters
3. Power Notes –Physical vs.
Chemical Changes (Bookshelf - 2
pgs - 4 sides – Please Staple)
4. Introduction to Density- Due
Today
5. Only tutorial this week will be Wed
at lunch.

2. 1) Introduction to Density Lab –
Due Today
2) Power Notes – Physical vs. Chemical
– Due on Thursday for Per. 1,3,7
4) Power Notes – Physical vs. Chemical
– Due Friday for per 2, 5, 6 & 8

3. •Basic particles that make up a
substance.
We can identify
substances
according to their
__________ &
___________
properties

4. Why do we have to use
more than just physical
properties to determine
what a substance is?
•required knowledge of more properties.
Physical Properties 1. Characteristics of materials that
can be observed w/out
carrying out a chemical
reaction
2. Usually easy to reverse
3. NO NEW substance created
Examples of Physical
Properties
Color, size, texture, density, freezing pt.
electrical & thermal conductivity, luster,
malleability, ductility, hardness, mass,
solubility
H2O
Ice
water
+
Heat
=
H2O
Liquid water

5. Chemical Properties 1. Characteristics that cannot be
easily seen
2. Must create a chemical
reaction to observe
3. NEW substance created
4. Difficult to reverse
5. Happens quickly (explosion) or
slowly (rusting).
Examples of Chemical
Change
Flammability, reacting with acid
Oxidation (rusting-reacting
w/oxygen), digesting,
decomposition
2 H2O + =
O2
H2 H2
2 molecules of water
electricity
1 molecules of
diatomic oxygen
2 molecules of diatomic Hydrogen
Different
Substances

6. Chemical Properties continues…..
Notice that water can be separated into its constituents……..-
2x the amount of hydrogen is collected as compared to
oxygen. (H2O) Why?

7. Signs a Chemical
Reaction may be
occurring:
1. Change in Color
2. Bubbling or Fizzing
3. Precipitant is created
http://www.harpercollege.edu/tm-
ps/chm/100/dgodambe/thedisk/chemrxn/signs.htm
4. Heat is absorbed or released
(endothermic vs. exothermic)
5. Energy is produced
What is the difference
between endothermic
and exothermic?
http://antoine.frostburg.edu/chem/senese/101/therm
o/faq/exothermic-endothermic-examples.shtml
Endothermic – Therm (heat)
Endo (in)
Ex: Cooking and egg, baking
bread, photosynthesis
Exothermic = Therm (heat)
Exo (out)
Ex: Rusting, Explosions, Fireworks

8. Physical or Chemical? 1. Identify whether the change is
Physical or Chemical
2. Identify the reason as either you
still have the Same substance or
a Different one was created
Your Ideas
Remember:
1. Observe the world around you.
Choose one physical change
and one chemical change.
2. Illustrate, Color and Label the
Event
3. Describe why the event is either
physical or chemical.
The Law of Conservation of Mass –

9. Remember: The Law of Conservation of Mass –
Matter cannot be CREATED or
DESTROYED. It can only change
form(physical) or become
rearranged (chemical – a change
in how the atoms are connected)
Review Questions • Answers in your notes
• Bullet format
On-line activity
Graded for HONESTY &
PARTICIPATION
Hyperlink on Learning Point under
Daily Assignments for this week.
SELECT: Quia Quiz
How many did you get correct on
your first try? ____/20

10. Power Notes – Physical vs.
Chemical – Due on Thursday
for Per. 1,3,7
4) Power Notes – Physical vs.
Chemical – Due Friday for Per.
2, 5, 6 & 8