- Show pupils that the change in sediment shape and size during transportation can be simulated by shaking plaster cubes in a cylindrical container. Ask them to investigate what happens over several cycles of tumbling in terms of,
eg number, average, mass or shape of fragments after each cycle. Ask pupils to show the results as line graphs or appropriate drawings, and to explain what has caused the changes and what happens to the 'lost' mass. Bring together the class results with the pupils, and help them to make generalisations about fragmentation.
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- identify changes in fragments as time and distance of transportation increase,
eg become smaller, smoother, rounder
- display their results,
eg line graph for average mass of fragments, drawings for shape of fragments
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