Assessment focuses: AF1, AF4, AF5
As part of work considering changes of state and associated particle arrangements, pupils monitored the heating of water from room temperature to boiling point. Pupil H initially carried out the experiment using a thermometer and stopwatch and got poor results. He then attempted it with a data-logger and obtained the improved results shown here.
As a class, the pupils compared their results and considered what they might see when other substances were heated or cooled.
Pupils then annotated their graphs without access to secondary sources.
Pupil H explained that he decided to use the data-logger because it would provide ‘continuous measurement’. He chose to sketch an additional graph and used this as a basis for predicting the shape of the graph that would be obtained if the initial temperature were 10°C and the water were heated until it evaporated.