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Physical and Chemical Changes

Physical and Chemical Changes. Matter is. everywhere. anything that takes up space and has mass. constantly experiencing both chemical and physical changes. Physical Change. Physical changes occur when matter changes its property, but not its chemical nature.

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Physical and Chemical Changes

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  1. Physical and Chemical Changes

  2. Matter is... • everywhere. • anything that takes up space and has mass. • constantly experiencing both chemical and physical changes.

  3. Physical Change Physical changes occur when matter changes its property, but not its chemical nature.

  4. Physicalproperty changes could include a change in: • volume • mass • weight • density • texture • shape • size • color • odor

  5. Physical Change

  6. Chemical Change Chemical changes are changes that matter undergo when it becomes new or different matter.

  7. To identify a chemical change look for signs such as: • color change • bubbling and fizzing • light production • smoke • presence of heat

  8. Chemical Change Example: • A chemical change occurs when fireworks are used. • Fireworks are made of metals such as magnesium and copper. • These change chemically as they light up the sky.

  9. Is it a chemical or physical change? • Sugar dissolving in tea • Chemical Change • Physical Change

  10. OOPS! Did it change size, color, shape (Physical Change)? or Did it become different matter (Chemical Change)?

  11. Correct!

  12. Is it a chemical or physical change? • Logs burning • Chemical Change • Physical Change

  13. OOPS! Did it change size, color, shape (Physical Change)? or Did it become different matter (Chemical Change)?

  14. Correct!

  15. Is it a chemical or physical change? • Breaking water up by separating it into hydrogen and oxygen • Chemical Change • Physical Change

  16. OOPS! Did it change size, color, shape (Physical Change)? or Did it become different matter (Chemical Change)?

  17. Correct!

  18. Is it a chemical or physical change? • Cutting paper • Chemical Change • Physical Change

  19. OOPS! Did it change size, color, shape (Physical Change)? or Did it become different matter (Chemical Change)?

  20. Correct!

  21. Is it a chemical or physical change? • Crushing an aspirin • Chemical Change • Physical Change

  22. OOPS! Did it change size, color, shape (Physical Change)? or Did it become different matter (Chemical Change)?

  23. Correct!

  24. Is it a chemical or physical change? • Metal rusting • Chemical Change • Physical Change

  25. OOPS! Did it change size, color, shape (Physical Change)? or Did it become different matter (Chemical Change)?

  26. Correct!

  27. Is it a chemical or physical change? • Lighter fluid burining • Chemical Change • Physical Change

  28. OOPS! Did it change size, color, shape (Physical Change)? or Did it become different matter (Chemical Change)?

  29. Correct!

  30. Is it a chemical or physical change? • An egg rotting • Chemical Change • Physical Change

  31. OOPS! Did it change size, color, shape (Physical Change)? or Did it become different matter (Chemical Change)?

  32. Correct!

  33. Is it a chemical or physical change? • An egg breaking • Chemical Change • Physical Change

  34. OOPS! Did it change size, color, shape (Physical Change)? or Did it become different matter (Chemical Change)?

  35. Correct!

  36. Activity Time!!!

  37. Purpose: To figure out what type of change is happening: physical or chemical?

  38. Materials: • 2 tablespoons baking soda  • ¼ cup vinegar • 1 balloon • 1 bottle • funnel

  39. Hypothesis: If baking soda and vinegar and combined in a container sealed by a balloon, then ___________________________________________________________________________________________________________________. **Your team will decide together what to write

  40. Procedure: • Pour vinegar into the graduated cylinder. • Stretch open the balloon mouth and using your notecard funnel carefully pour the 2 tablespoons of baking soda into the balloon • Carefully stretch the balloon mouth over the bottle. Make sure the balloon mouth is tightly around the neck of the bottle. • Hold the balloon to the side so that the baking soda does not fall into the vinegar. • Now, be ready to watch! Shake the balloon carefully so that it stays attached to the bottle, but so that the baking soda falls into the bottle.

  41. Observations: • Draw a picture of observations of what happened to the balloon after the substances were mixed together. • LABEL YOUR DRAWING.

  42. Conclusion: • What kind of change(s) took place? • How do you know?

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