New ELI today: 'Rolling, hopping, floating and invisibly moving along; investigating how sediment is transported by water'.
After completing the activity, pupils can:
• observe that under very low flow, some grains become suspended;
• realise that with faster flow some sand grains bounce along while others are carried round and round by the flow;
• appreciate that a much faster flow is required to roll or slide the gravel grains along the bottom of the bowl.
• observe that the salt dissolved and went into solution.
Many more activities about the erosion, transportation and deposition of sediment can be found on the ELI website.