The location of the River Clyde is shown on a map of the Central Lowlands of Scotland. The river is followed from its source to the sea. The Clyde is about 170km in length and drops 600m on its journey to the sea. The last part of the river is navigable and is famous for a spectacular set of waterfalls, the Falls of Clyde. The terms 'source' and 'upstream' are explained.
Pupils could be asked to follow the River Clyde from its source all the way to the sea. They could plot its path on a map and they could write a story or poem explaining the path the water takes on its journey to the sea. The clip could then be viewed as a climax to the activity and as the final answer to the task.