FIRST LET’S REVIEW : Physical and Chemical Changes Physical Change Chemical Change O Doesn’t create a new substance O Changes the form or shape O Phase changes are physical changes Solid → liquid → gas Gas → liquid → solid Solid → gas O Change in matter which creates a new substance O How can I tell if a chemical change has occurred? O A gas is produced (bubbles) O A change in color O A change in temperature
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FIRST LET’S REVIEW : Physical and Chemical Changes Physical Change Chemical Change O Doesn’t create a new substance O Changes the form or shape O Phase.
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FIRST LET’S REVIEW :Physical and Chemical
ChangesPhysical Change Chemical Change
O Doesn’t create a new substance
O Changes the form or shape
O Phase changes are physical changes
Solid → liquid → gasGas → liquid → solid
Solid → gas
O Change in matter which creates a new substance
O How can I tell if a chemical change has occurred?O A gas is produced
(bubbles)O A change in colorO A change in
temperature
Is the formation of rust a physical or chemical
change?
CHEMICAL
Is evaporation of water a physical or chemical
change?
PHYSICAL
Is tearing paper in strips a physical or chemical
change?
PHYSICAL
Are exploding firecrackers a physical or
chemical change?
CHEMICAL
Is burning a match a physical or chemical
change?
CHEMICAL
Which is an example of a chemical
change?1.a balloon that is blown up.
2.Ice melting.3.paper burning4.a metal pan heating on the stove.