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Physical and Chemical Changes in Matter

Physical and Chemical Changes in Matter. How to tell the difference. Matter- what is it?. Defined as anything that has mass and takes up space Can be measured with tools like: Graduated cylinder Triple beam balance Ruler. Physical Change.

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Physical and Chemical Changes in Matter

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  1. Physical and Chemical Changes in Matter How to tell the difference

  2. Matter- what is it? • Defined as anything that has mass and takes up space • Can be measured with tools like: • Graduated cylinder • Triple beam balance • Ruler

  3. Physical Change • Substance may seem different, but no new substance is created!!!!

  4. Physical Change Molecules stay the same, but move farther apart

  5. It’s a physical change if… • It changes shape or size.

  6. It’s a physical change if… • It dissolves.

  7. It’s a physical change if... • It changes phase, or state of matter.

  8. Changing states of matter- Physical Change More heat added: Heat added: Melts Boils or Evaporates Gets even colder, Heat removed: Cools down, Heat removed: Condenses Freezes

  9. Chemical Change • Makes new substances as the result of a chemical reaction.

  10. Chemical Change Molecules are re-arranged forming a new substance.

  11. Chemical Change Molecules are re-arranged forming a new substance.

  12. It’s a chemical change if…. • It burns.

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

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

  15. It’s a chemical change if... • It changes color.

  16. It’s a chemical change if... • It forms a precipitate (unexpected formation of a solid).

  17. It’s a chemical change if... • Change in odor or smell.

  18. Put Your Notes Away…

  19. Ralley Round Table List the evidence for a chemical reaction Hint… there are 6. • It burns • It changes temperature • It bubbles (a gas forms) • It changes color • A precipitate forms • Change in odor or smell

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