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Physical and Chemical Changes PowerPoint PPT Presentation


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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

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Physical and chemical changes l.jpg

Physical and Chemical Changes

How to tell the difference


Physical change l.jpg

PhysicalChange

  • Substance may seem different, but the way the atoms link up is the same.


It s a physical change if l.jpg

It’s a physical change if

  • It changes shape or size

  • It dissolves.


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It’s a physical change if...

  • It changes phase (freezes, boils, evaporates, condenses)


Chemical change l.jpg

Chemical Change

  • Changes the way the molecules link up

  • Makes new substances


It s a chemical change if l.jpg

It’s a chemical change if….

  • It burns

  • Temperature changes without heating/cooling


It s a chemical change if7 l.jpg

It’s a chemical change if...

  • It bubbles (makes a gas)


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It’s a chemical change if...

  • It changes color

  • It forms a precipitate


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What kind of change is it if someone...

  • Tears up paper?

  • Physical change

  • Mixes salt and water?

  • Physical change


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What kind of change is it if someone...

  • Burns paper?

  • Chemical change

  • Evaporates salt water?

  • Physical change


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What kind of change is it if someone...

  • Mixes vinegar and baking soda?

  • Chemical change


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