Question

question 10
2 pts
which statement is false regarding the headwaters of a stream?
the gradient is steep.
channels are rocky.
the average grain size is small.
discharge is low.

Explanation:

In the headwaters of a stream, the gradient is steep (as the stream starts in higher - elevation areas), channels are rocky (due to erosion and lack of significant sediment deposition initially), and discharge is low (as the stream is just beginning and has not yet accumulated a large volume of water from many tributaries). However, the average grain size is large. This is because in the headwaters, the stream has more energy (due to steep gradient) and can carry larger sediments. As the stream moves downstream, it loses energy (gradient becomes gentler), and the average grain size of the sediment it carries becomes smaller.

Answer:

The statement “The average grain size is small” is false.