BBC Learning Zone Clips

CLIP 2295

Separating mixtures of materials

Separating mixtures of materials
Play
Key Info
  • Separating mixtures of materials
  • Duration: 01:36
  • An introduction to separating mixtures. When salt is added to water most of it dissolves to make a solution - salt is soluble in water. When sand is added to water it either hangs in the water or forms a layer at the bottom of the container. Sand therefore does not dissolve in water - it is insoluble. It is easy to separate sand and water by filtering the mixture. Salt can be separated from a solution through evaporation. The water can also be recovered as well as the salt if the water vapour is trapped and cooled to condense the water vapour back into a liquid. This process is called distillation.
  • Subject:

    Science

       Topic:

    Separating Mixtures of Materials

  • Keywords: salt, water, dissolve, solution, soluble, insoluble, filter, filtration, evaporation, vapour, condense, liquid, distillation
Ideas for use in class
  • This clip would be useful when learning about separating mixtures of materials. It could be shared with pupils before they carry out some hands-on experiments of their own. It might be used in place of some experiments which take some time to observe, such as the distillation process. It would also be a good clip to use to reinforce learning which has taken place over several weeks, or for revision.
Background details
  • Clip language : English
  • Aspect ratio : 16x9

BBC navigation

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.