A young river is very active. It is still at the upper course. It moves at a characteristic high speed that enhances its active down-cutting and under-cutting. Its competence is very high due to its speed.
An old river on the other hand is characterised by its materials and also the topography of its course. The old river has lost its competence due to the gradient of its course. The speed is low compared to a young river.
i would have to say because it is smaller and it has rough non smooth surfaces
fast
Young rivers are straighter and more narrow. Old rivers have many meanders (bends in a rivers channel), and young rivers do not they are fast and have a high gradient, unlike old rivers which are slow and have a shallow gradient.
fast
Fast when young but with age they do slow down.
both
Very slow. :)
really slow
bobcats travel fast,but they only go up to 57 m.p.h.
Fast moving rivers are capable of carrying larger rock particles than slow moving rivers.
Fast flowing rivers are more erosive and are light on the deposition of sediments. Slow flowing rivers allow for the deposition of sediment which create the meanders.
Most of the time they get around by the current, so they are not that fast, it depends on the current
extremely slow! they have a shell to help protect them from predators because they move so slow
Yes, but it takes longer.