The film describes the journey of a river from its source to its end - or mouth - which is most likely ... They could consider how else the river might change as a result of heavy or low rainfall.

This short film shows pupils how a river changes as it moves from source to mouth. It can be used to describe what happens at each stage of the river journey and to explore how the river changes ...

River organisms have evolved in diverse and fascinating ways in the varied environments between river source and mouth. The blue ... But the physical changes in three dimensions along a river ...