3rd Grade Ch. 11 Physical And Chemical Changes

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3rd Grade Ch. 11 Physical And Chemical Changes

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

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