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Week 4

Investigative Science - Fizzy Pirate Coins

For this investigation you will need:

  • coins
  • cola
  • vinegar
  • baking soda
  • flour
  • food colouring
  • water

Fizzy Pirate Coins & Rocks Experiment


  • Which worked best to clean the coins? Cola or vinegar?
  • What happened when you dropped vinegar on your rocks?
  • What reaction did you see?
  • Do you know why this happened?
  • Can you explain?