How to tell the
difference
Physical and
Chemical
Changes
Physical Change
•Substance may
seem different, but
the way the atoms
link up is the same.
It’s a physical change if
•It changes shape
or size
•It dissolves.
•It changes phase
(freezes, boils,
evaporates,
condenses)
It’s a physical
change if...
•Changes the way
the molecules link
up
•Makes new
substances
Chemical Change
It’s a chemical change
if….
•It burns
• Temperature
changes without
heating/cooling
It’s a chemical change
if...
•It
bubbles
(makes a
gas)
It’s a chemical change
if...
•It changes
color
•It forms a
precipitate
What kind of change is it
if someone...
•Tears up paper?
•Physical change
•Mixes salt and
water?
•Physical change
What kind of change is it
if someone...
•Burns paper?
•Chemical change
•Evaporates salt
water?
•Physical change
What kind of change is it
if someone...
•Mixes vinegar and
baking soda?
•Chemical change
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Phys and chem_changes

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Phys and chem_changes

  1. 1. How to tell the difference Physical and Chemical Changes
  2. 2. Physical Change •Substance may seem different, but the way the atoms link up is the same.
  3. 3. It’s a physical change if •It changes shape or size •It dissolves.
  4. 4. •It changes phase (freezes, boils, evaporates, condenses) It’s a physical change if...
  5. 5. •Changes the way the molecules link up •Makes new substances Chemical Change
  6. 6. It’s a chemical change if…. •It burns • Temperature changes without heating/cooling
  7. 7. It’s a chemical change if... •It bubbles (makes a gas)
  8. 8. It’s a chemical change if... •It changes color •It forms a precipitate
  9. 9. What kind of change is it if someone... •Tears up paper? •Physical change •Mixes salt and water? •Physical change
  10. 10. What kind of change is it if someone... •Burns paper? •Chemical change •Evaporates salt water? •Physical change
  11. 11. What kind of change is it if someone... •Mixes vinegar and baking soda? •Chemical change

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