11 51) A graphic depiction of a streams gradient from its headwaters to mouth is called a(n)
E 52) Which of the following is correct of the longitudinal profile of most rivers?
C 53) The process whereby streams lengthen their channels upstream is called
A 54) Stream piracy refers to A) the legal process by which a state secures rights to the waters of a river basin. B) the merging of two streams flowing in the same valley. C) capturing the headwater regions of another stream by an eroding rill in another system. D) the illegal withdrawal of water from a river. E) upstream erosion leading the to the lengthening of the channel. Answer:
C 55) Base level refers to
B 56) The ultimate base level is