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Physical and Chemical Changes. How to tell the difference. 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’s a physical change if.

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physical and chemical changes

Physical and Chemical Changes

How to tell the difference

physical change
PhysicalChange
  • Substance may seem different, but the way the atoms link up is the same.
it s a physical change if
It’s a physical change if
  • It changes shape or size
  • It dissolves.
slide4
It’s a physical change if...
  • It changes phase (freezes, boils, evaporates, condenses)
chemical change
Chemical Change
  • Changes the way the molecules link up
  • Makes new substances
it s a chemical change if
It’s a chemical change if….
  • It burns
  • Temperature changes without heating/cooling
it s a chemical change if7
It’s a chemical change if...
  • It bubbles (makes a gas)
it s a chemical change if8
It’s a chemical change if...
  • It changes color
  • It forms a precipitate
what kind of change is it if someone
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 someone10
What kind of change is it if someone...
  • Burns paper?
  • Chemical change
  • Evaporates salt water?
  • Physical change
what kind of change is it if someone11
What kind of change is it if someone...
  • Mixes vinegar and baking soda?
  • Chemical change
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