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  • 1 cup raw cherries (pits and stems removed)
  • 1 cup chopped raw tomatoes
  • Food processor
  • Coffee filters
  • 10 mason jars with at least 250 mL capacity
  • Laboratory hot plate
  • 2% iodine solution
  • 5 eyedroppers
  • Cornstarch
  • Distilled water
  • Graduated cylinder
  • Funnel
  • Permanent marker
  • Plastic spoons (can rinse and re-use)
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    Complexity level:
    Project cost ($):
    Time required:
    15 minutes to simmer fruit. 1-2 hours for set-up and completion of other lab steps.
    Material availability:
    Most materials can be found at a grocery store. Iodine can be purchased from a drug store or online. Graduated cylinders and lab hot plates can likely be found in a school laboratory or at laboratory supply store.
    Safety concerns:

    You should avoid ingesting iodine or getting it into the mouth or eyes. Burning hazard from cooking fruits. Food processors should be used under adult supervision.