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Bellringer 11-7-2013
What are the 2 most basic categories of
matter?
2. If you shine a flashlight through a glass of
KoolAid and then a glass of water with a
little milk mixed in, which one(s) would you
see the light beam going through the
glass?
a. Kool-Aid
b. Milky water
c. Both
1.
What is Matter?
It has mass and takes up space
 Everything around us is matter

ON A PIECE OF NOTEBOOK PAPER, MAKE THE
FOLLOWING GRAPHIC ORGANIZER
Physical Properties
Chemical Properties
Physical Changes
Chemical Changes
Physical Properties


Definition: can be observed without
altering the chemical composition of a
substance
Examples: color, texture, malleability, solubility,
mass, volume, density
Malleable: capable of being
extended or shaped by beating
Play Dough: Physical Properties
Color?
 Texture?
 Malleability?
 Mass?
 Solubility?

Physical Properties
Physical properties can be
described as being intensive
or extensive.
Extensive Properties:
• Dependent
on
size.
• volume,
mass, and
length
Intensive Properties:
• do
not change with the sample
size
• can be useful in identifying a
substance

color, density, viscosity, temperature, solubility,
and states of matter.
Chemical Properties
Definition: the ability of a
substance to combine with or
change with other substances.


Toxicity, reactivity, flammability, radioactivity
Play Dough: Chemical Properties
Toxicity
 Reactivity
 Flammability
 Radioactivity

#1
The boiling point of a
certain alcohol is 75
degrees Celsius

Physical
#2
Copper forms green
copper carbonate
when in contact with
moist air

Chemical
#3
Table salt
dissolves in
water

Physical
#4
Copper is a good
conductor of heat and
electricity

Physical
#5
Magnesium burns
brightly when ignited

Chemical
#6
Iron is more dense than
aluminum

Physical
What’s the Difference?



Matter can change
Examples: Freeze, cut, burn, etc.
2 types of changes
1.
2.
Physical changes
Chemical changes
Physical Changes
Definition: when the state or form of
matter is changed physically or
mechanically
 Clue: still the same stuff


Examples: breaking, cutting, freezing, melting, etc.
Ask yourself…”Can it
be turned back into
how it started?” Yes
Chemical Change
Definition: takes place on a molecular
level (reaction) and produces a new
chemical substance.
 Clue: new stuff, color etc.
 A chemical change always involves a
chemical reaction

Where is the Evidence???

Evidence of chemical change:
color
change, gas production, and
release of heat, light, odor, or sound.
Examples: Burning (combustion), rusting,
tarnishing and fermenting
ice melting
burning a chemistry book
melting iron
frying an egg
fireworks exploding in the sky
turning wood into a baseball bat
baking a cake
sharpening a pencil
sulfuric acid added to sugar
http://www.youtube.com/watch?v=nqDHwd9
rG0s
carving a watermelon into a creepy
looking face
pouring liquid nitrogen into a bowl and
watching it vaporize
Exit Ticket:

A chemist is looking to describe a chemical with
a intensive property. Which of the following is an
intensive property?
Mass is 6.7g
b. Boiling point is 500 C
c.
Volume is 4 cm3
Label as physical or chemical:
Ice melting
Baking a cake
Iron rusting
a.