A powerpoint to recap the theory of osmosis and prepare them for the potato practical<br />
A second powerpoint to re weigh the potatoes and draw a graph<br />
A third ppt with just 2 slides to give pupils more guidance when writing the hypothesis (lower sets)
Pupils work through the worksheet and add to the diagram. By the end of the lesson they will end up with a summary of how waves are used in communication. Can be enlarged for pupils to work on in a group.