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CLIP 8739

A practical demonstration of the relative densities of liquids

A practical demonstration of the relative densities of liquids
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Key Info
  • A practical demonstration of the relative densities of liquids
  • Duration: 02:55
  • Dr Yan Wong demonstrates the relative densities of different liquids using cranberry juice and alcohol. The two liquids are divided by a plastic card which is moved to allow a small opening. After a few minutes the higher density cranberry juice sinks to the bottom and the lower density alcohol moves to the top. The experiment can be replicated using a sugary cordial and water instead of alcohol. Published as part of the Bang Goes the Theory website: bbc.co.uk/bang/. Please note this clip is only available in Flash.
  • Subject:

    Science

       Topic:

    Chem: Materials - States of Matter

  • Keywords: liquid, density, alcohol, trick, experiment, observation, chemistry, BangGoesTheTheory
Ideas for use in class
  • This clip could be used as an introduction to density. After showing the clip the teacher could repeat the experiment in the classroom or students could be set it for homework, provided they are supervised and warned of risks associated with alcohol. Students could be asked to explain what has occurred in their own words. The step-by-step guide to doing the experiment is available here bbc.co.uk/bang/handson/swapshot.shtml.
Background details
  • Clip language : English
  • Aspect ratio : 16x9

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