The Revenge of the Witch Science Fair Project

Today we are going to work in teams to present our scientific witch findings.

  • Decorate our Science Fair Display Board with The Revenge of the Witch themes.
  • Create a printable PowerPoint/Keynote slideshow with our research…
  1. Purpose & Background:  History tells us that in the Middle Ages, villagers would tie a rope around an accused witch and throw her into water.  If she was innocent, she would sink to the bottom and they would pull her out.  If she were guilty, she would float to the surface and await a worse fate.  If you were accused of Medieval witchcraft, would you rather be throw into fresh or salt water?
  2. Testable Question: How does salt concentration affect buoyancy?
  3. Hypothesis:  An egg will float in fresh water.
  4. Materials:  3 Eggs, 3 Glass Cups, 1500ml Water, 100ml Salt, Permanent Marker, Spoon
  5. Procedure:  Fill one cup with 500 ml of Water. Fill a second cup with 500 ml of Water plus 15 ml of Salt. Fill a third cup with 500 ml of water plus 75 ml of Salt.  Use a spoon to stir each cup.  Place an egg with a witch drawn on it in each cup.  Observe the results.
  6. Results:  The egg sunk in the fresh and brackish water, but floated in the salty water. (See Pictures)
  7. Conclusion:  If you wanted to be found innocent of witchcraft in Medieval Europe, you should request to be thrown into fresh water.

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