If the river is young it is steep in places and doesn't meander (curve). A mature river isn't so steep and it is starting to form meanders; but be careful because old rivers are completely flat and do have meanders.
Youthful [young] river is a river with a steep gradient that has very few tributaries and flows quickly. Its channels erode deeper rather than wider. Old river is a river with a low gradient and low erosive energy. Old rivers are characterized by flood plains.
it is how wide it is
No because it has a part of its brain that can tell the difference between a meal and its young.
That is a very good answer reader, well it actually depends of what kind of frog is is like if it is a bull frog you can tell but if it is a fire belly frog no one knows.
Can you tell the difference between Vyvanse and Concerta in a drug test
how can you tell the difference between a tortoise and a turtle by shell in picture
Old nipples are dark brown and rather wrinkly whereas young nipples are pink or very light brown, plump and wrinkle-free!
Vending machines have laser scanners that can tell the difference between the bills.
you can tell the difference between right and wrong from the little voice inside your head
please tell me the difference between thickness
no but you can tell the difference by taste
No difference
No. You can't tell the difference, for one reason: There IS no difference.
tell me