- Show pupils photographs or video clips of cliffs with sedimentary strata and ask them to suggest,
eg in drawings or annotated diagrams, how the layers were formed.
- Ask pupils to investigate how quickly sediment settles using grains of different sizes,
eg clay, sand, gravel, in a jar of water.
- Ask pupils to observe if the layers have sharp boundaries or grade into each other and to relate this to the conditions under which the layers were formed. Ask pupils to speculate about what controls the thickness of layers and to explain their ideas to others.
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- describe how sediments settle to form layers
- identify in drawing or annotation that different layers were formed at different times
- relate observations about sedimentary layers to factors,
eg particle size
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