Physical vs.
Chemical Change
pg 87
Bpop
Physical Change-
1) Only physical
properties change.
Chemical properties do
not change.
2) Physical changes are
generally easy to
reverse.
3) No energy is
produced by the
substance.
Chemical Change1) Both physical and
chemical properties are
changed.
2) Changes are not
reversible without another
reaction.
3) Energy is often
produced ( fire or heat, for
example).
Most chemical changes will
have one or more of the
following:
Heat
Burning
Color without you adding it
Odor
Gas given off
Law of Conservation
of Mass
Matter may change
form, it can not be
created or destroyed
http://www.brainpop.com/science/matte
randchemistry/conservationofmass/
Bpop quiz
Let’s test
your
knowledge
Pick an apt clock to work with
Every group gets a whiteboard
Have 30 sec to 1 min
Then 321 show!
Baking
Chemical
Change
Mashing
potatoes
Physical
Change
Ripping
a page
Rotting
an apple
Chemical
Change
Adding
food
coloring to
Physical
Change
Chewing
food
Physical
Change
Digesting
food
Chemical
Change
An ice
cube
melting
Physical
Change
Mixing salt
in water
Physical
Change
Two clear liquids
are mixed and a
white color forms
Chemical
Change
Water
turning to
vapor
Physical
Change
Mixing salt
and sugar
Physical
Change
The reason the Statue
of liberty is green
Chemical
Change
Respirati
on
Chemical
Change
Photosy
nthesis
Chemical
Change
Practice time!