- Review work on changing state by presenting children with pictures or descriptions of simple situations eg breathing on a mirror, a picture of a kettle boiling, clouds forming, wax running down the side of a lighted candle, a wet hand print on a suitable surface eg blackboard, molten lava from a volcano solidifying, leaving an ice cube in a warm room and asking them to link the situation to the process involved. Re-introduce the terms 'state' and 'changes of state'.
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- recognise that melting, freezing, evaporation and condensing are all changes which can be reversed and all changes which involve a change of state
- identify correctly examples of the above changes
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