BBC Learning Zone Clips

CLIP 10618

Does mass change during a change of state?

 Does mass change during a change of state?
Key Info
  • Does mass change during a change of state?
  • Duration: 01:27
  • An explanation of why mass does not change during a physical change. The examples used are melting and boiling. Animations are used to show that atoms and molecules are not made or destroyed.
  • Subject:



    Chem: Materials - States of Matter

  • Keywords: mass, molecule, melting, boiling, physical change
Ideas for use in class
  • To help to conclude an experiment where students measure the mass of substances before and after a physical change, for example, melting and dissolving. Students could then storyboard their own clip or presentation to explain why mass doesn't change in dissolving.
Background details
  • Clip language : English
  • Aspect ratio : 16x9

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