Density of Two Liquids

This experiment teaches about the density of liquids, through a demonstration that kids find surprising. Fill two containers with two clear liquids – one water, the other isopropanol, and observe how an ice cube will float in one, and sink in the other. Don’t tell your students that the liquids are different – let them discover for themselves.


  • Beakers
  • Rubbing (Isopropyl) alcohol
  • Water

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