Using Chemical Change to Identify an Unknown

If you have taught the first instructional activity in this mini unit, learners already know that cabbage juice and vinegar cause chemical changes in some materials. Now, they get a chance to use them to compare the liquids' reactions to five known and one unknown substance. 

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Pros

  • Colorful teacher's resources include well-written procedures, an assessment rubric, and expected results
  • An exciting exploration of chemical reactions that is part of an outstanding unit
  • Includes a neat lab sheet and related worksheets for reinforcement
Cons

  • None