Density
Properties of Matter

Coloured Rain

Enrichment Activity for 5-11 11-14


What you need

  • Empty glass jar
  • Oil
  • Food colourings in different colours
  • Water

Instructions

  1. Fill up a jar with warm water
  2. In the lid, mix a few tablespoons of oil with a few drops of food colouring
  3. Pour this mixture into the water
  4. A stream of colour will now start falling down

Results and Explanation

Food colouring and oil don't mix, and as the two separate the food colouring sinks into the water, leaving trails of colours.

Density
appears in the relation m=ρV
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