the stream bed. Answer:True False
72) The increased velocity downstream in the Mississippi River is masked by its reduced turbulence.
73) Erosion of the valley walls of a channel normally occurs on the outsidecurve of a meander.
74) When a stream is graded (at grade), it has attained its lowest possible gradient and slowest flow velocity.
75) Nickpoints migrate downstream. Answer:True False
76) Aggradation of a stream channel produces scouring and alluvial terraces.