the river source is where the water bubbles up from under the ground and creates a river.
This is where the water bubbles up from the ground and creates a river or this is where the river starts. The Source and River Mouth are basically the same thing, they both start the rivers off, as you can tell my the 'Mouth' bit in the word 'River Mouth'.
a beginning of a river
In geography input means... for example, what goes into the river.
The strata over which a river flows.
It means that "Geography Controls Everything" Source : From a textbook
The source of a river is where it begins, the mouth of a river is where it enters the sea.
i think it would be the Colorado river but i am not positive. and a question for you, are you doing this for pigskin geography?
Where it starts
Drainage Basin: The Area of Land Drained By A River.
The river's course is its route; where it goes.
small pebbles and stones are bounced along the river bed
Rivers, streams or such like that flow into another larger river