Download Physical and Chemical Changes

Physical and
Chemical Changes
2.4.1, 2.4.2
Objectives
2.4.1 Identify examples of physical changes
and provide support that a physical change is
taking place.
2.4.2 Identify examples of chemical changes
and provide support that a chemical change is
taking place.
Physical Changes
KP1 Physical change does NOT result in the
creation of a new substance. All substances
involved retain their properties.
Physical Change
KP2 Physical changes include cutting, tearing,
folding, shredding, boiling, melting,
evaporating, condensing, and dissolving.
Physical Change
KP3 Changes in the states of matter are
PHYSICAL changes.
Chemical Change
KP1 Chemical change results in the creation of
one or more NEW substances, with new
chemical properties.
Chemical Change
KP2 Evidence that a chemical change has
occurred includes a permanent change in
color, release of a gas (bubbles), scent, light,
or change in temperature.
Chemical Change
KP3 Chemical Reaction = Chemical Change
Examples of Physical Change
Evidence of Chemical Change
We Do
Venn Diagram
You Do Together
Stations
You Do Alone
1. Read pages 330 - 338
2. Answer questions 9-19 on a blank sheet.
3. When finished, put sheet behind
“Classwork”
Exit Ticket
1. Which is a characteristic of all
chemical changes?
a. a different state of matter is produced
b. some mass is converted to energy
c. some form of light is given off
d. a new material is formed
2. Which activity is an example of a
chemical change?
a. Dissolving table salt in water
b. Hammering aluminum into thin sheets
c. Melting gold to make jewelry
d. Burning wood to produce ashes
3.
a.
b.
c.
d.
Which is an example of a physical change?
Boiling
Burning
Rotting
Rusting
4. Mark mixed a powder and a liquid together
in a test tube. As he watched, the mixture
began to bubble, and gas was released. Which
of the following is most likely true?
a. The liquid made the powder evaporate.
b. The powder made the liquid change to a
solid.
c. The powder and the liquid reacted
chemically.
d. The powder and the liquid could not mix.
5. When a candle is lit, the wick burns, the
wax melts, the candle changes shape, and
the air around the candle heats up. Which
of the following is an example of a chemical
change?
A. The wick burning
B. The wax melting
C. The candle changing shape
D. The air around the candle heating up.