indicate how rapids differ from waterfalls.
Rapids are sections of a river where the water flows quickly over rocks and obstacles, creating turbulent and choppy conditions. Rapids typically occur in a shallow and fast-moving part of the river and do not have a vertical drop like a waterfall.
Waterfalls, on the other hand, are sections of a river where the water cascades over a vertical ledge or cliff, creating a dramatic and often beautiful display of flowing water. Waterfalls typically have a more consistent and steady flow of water compared to rapids, which have a more chaotic and varying flow.