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A description of evaporation and condensation of water. Explains how an increase in energy causes water to evaporate to form steam, and how a decrease in energy causes steam to condense to water. Animations illustrate the particle arrangements during these changes in state.
This clip is from:
First broadcast:
28 February 2008

Classroom Ideas

This clip could be shown towards the end of the particle theory topic. Start by asking the students to come up with an answer for the question asked at the beginning of the clip. This could be done in pairs on individual whiteboards so that they can use particle diagrams to support their arguments.