Question 4 (10 points) Erosion by removal of rock debris is exemplified by: a) R

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Question 4 (10 points) Erosion by removal of rock debris is exemplified by: a) Runoff that flows quickly into the head of a stream b) A turbulent stream lifting loose sediment from the stream bed c) The formation of V-shaped stream valleys d) A sediment-dense stream chipping pieces of rock away from the stream bed Save Question 5 (10 points) Gradients usually decrease downstream in a major river system True False Save Question 6 (10 points) Alluvium refers to stream deposits, mainly sand and gravel. True False

Explanation / Answer

4) Option A is correct

Runoff that flows quickly in to the head of stream.

Mass-wasting events that form when heavy rainfalls produce large amounts of runoff that transport eroded soils, sediments, and plant debris down slope where the flows eventually spreads out across valley bottoms.

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