Science project

Density Experiment


  • Measuring cup
  • Clear glass jar (labels removed)
  • ½ cup water
  • Food coloring
  • ½ cup corn syrup
  • ½ cup vegetable oil
  • Marble
  • Small rubber ball of approximately the same size as marble
  • Circle of carrot, mini marshmallow, other small objects


  1. Pour the water into the jar.
  2. Color it with food coloring.
  3. Pour the corn syrup into the jar. What happens?
  4. Carefully pour the oil into the jar. What happens?
  5. Drop the marble into the jar. Does it float? Sink?
  6. Drop the ball into the jar. Does it float? Sink?
  7. Continue dropping objects into the jar and observing what happens.
  8. What can you tell about the densities of the liquids and the objects?
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