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Freezing water and melting ice - global warming and rising sea levels

Freezing water and melting ice - global warming and rising sea levels
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Key Info
  • Freezing water and melting ice - global warming and rising sea levels
  • Duration: 03:48
  • Freezing and melting water are described within the context of global warming and rising sea levels. Why should the sea level rise when ice melts? Presenter Dr Yan explains how the molecules of oxygen and hydrogen in fresh water behave differently as they change temperature. As water warms slightly it begins to expand. He also explains how sea level rises may be caused by ice on land melting and running into the sea, adding to the total amount of water in the sea. 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:

    Changing Materials: Reversible Change

  • Keywords: molecules, freezing, water, liquid, environment, density, expansion, BangGoesTheTheory
Ideas for use in class
  • Use as a stimulus for investigating freezing and melting. Pupils could view the clip and represent the information in their own words. Use as a stimulus for pupils' own investigations into the causes and effects of global warming.
Background details
  • Clip language : English
  • Aspect ratio : 16x9
Video options
  • Location of Flash Video clip:

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