3rd Grade Ch 11 Lesson 3 What Are Chemical Changes In Matter

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3rd Grade Ch 11 Lesson 3 What Are Chemical Changes In Matter

  1. 1. Ch. 11 Lesson 3 What are chemical changes in matter?
  2. 2. chemical change <ul><li>one kind of matter changes into a different kind of matter </li></ul><ul><li>makes new substances </li></ul>Sugar and sulfuric acid chemical change
  3. 3. chemical change <ul><li>usually cannot be changed back to the original kind of matter </li></ul>
  4. 4. Physical change vs. chemical change
  5. 5. chemical change <ul><li>some happen quickly </li></ul>
  6. 6. Fast Chemical Reactions [00:44]
  7. 7. chemical change <ul><li>some happen slowly </li></ul>
  8. 8. Slow Chemical Changes in Matter [01:10]
  9. 9. examples of chemical changes <ul><li>baking bread </li></ul>
  10. 10. examples of chemical changes <ul><li>burning wood </li></ul>
  11. 11. examples of chemical changes <ul><li>iron rusting </li></ul>
  12. 12. examples of chemical changes <ul><li>cooking eggs </li></ul>
  13. 13. examples of chemical changes <ul><li>fireworks </li></ul>
  14. 14. examples of chemical changes <ul><li>using a battery </li></ul>
  15. 15. examples of chemical changes <ul><li>digesting food </li></ul>
  16. 16. examples of chemical changes <ul><li>baking a cake </li></ul>
  17. 17. Review time
  18. 18. How do you know burning wood is a chemical change? <ul><li>When the wood burns, the wood changes to gases and ashes. The gases and ashes are a different kind of matter. </li></ul>
  19. 19. How do you know baked bread has undergone a chemical change? <ul><li>The ingredients cannot be changed back to their original form. </li></ul>
  20. 20. What is an example of a slow chemical change? <ul><li>rusting iron </li></ul>
  21. 21. What is an example of a fast chemical change? <ul><li>burning wood </li></ul>
  22. 22. How is a chemical change different from a physical change? <ul><li>Chemical changes produce new kinds of matter, but physical changes do not. </li></ul>
  23. 23. When does your body produce chemical changes? <ul><li>When it breaks down food for energy and growth. </li></ul>
  24. 24. <ul><li>wood  chemical change  ashes </li></ul>

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