Working on your own or in pairs, choose an ecosystem you are familiar with. It could be one of these, or something else:
- Beach and coastline
- Reefs
- Bushland
- Ocean
- Desert
Get pen and paper, and draw the system
Draw your living nodes and non-living nodes.
Draw arrows between the nodes to represent relationships.
Write the type of relationship the two nodes have next to the arrows.
Leave lots of space around them to add more nodes and arrows later.