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Physical and Chemical Changes

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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  1. Physical and Chemical Changes How to tell the difference

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

  3. It’s a physical change if • It changes shape or size • It dissolves.

  4. It’s a physical change if... • It changes phase (freezes, boils, evaporates, condenses)

  5. Chemical Change • Changes the way the molecules in a substance link up • Makes new substances

  6. It’s a chemical change if…. • It burns • Temperature changes without heating/cooling

  7. It’s a chemical change if... • It bubbles (makes a gas)

  8. It’s a chemical change if... • It changes color • It forms a precipitate- a substance is left over

  9. What kind of change is it if someone... • Tears up paper? • Physical change • Mixes salt and water? • Physical change

  10. What kind of change is it if someone... • Burns paper? • Chemical change • Evaporates salt water? • Physical change

  11. What kind of change is it if someone... • Mixes vinegar and baking soda? • Chemical change

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