Try testing items to see which are more or less dense than water. Physicist James Lees explains how this allows us to work out how much sugar is in a drink.

What you will need:

  • A container full of water
  • A can of full sugar drink
  • A can of diet drink
  • A number of waterproof objects (try fruit and vegetables)

Health and Safety:

  • Young children should be supervised around water to avoid the risk of drowning
  • Electronic items, particularly those plugged into a wall socket, should be kept away from water

About the researcher

James Lees is a postgraduate researcher with the University of York’s Department of Physics.