Discuss the concept of the graded stream. Do most streams ...

[Melani1276]

Discuss the concept of the graded stream. Do most streams approximate a graded stream? Why or why not?
 
  What will be an ideal response?

Question 2

The thickness of Earth's crust ranges from
 
  A) 70 km to 250 km (43 mi. to 155 mi.).
  B) barely 1 km to 2900 km (0.62 mi. to 1800 mi.).
  C) the surface to an unknown depth.
  D) 7 km to 250 km (4 mi. to 155 mi.).
  E) 5 km to 60 km (3 mi. to 37 mi.).

[Alyson.hiatt@yahoo.com]

Answer to Question 1

A graded stream is one in which the channel slope has adjusted so that the stream velocity is just enough to transport the sediment load. In other words, the stream is at a dynamic equilibrium between aggradation and degradation. An individual stream can have both graded and ungraded portions. This is actual the rule and not the exception. Disturbances in the drainage basin can disrupt this equilibrium.

Answer to Question 2

E

[Melani1276]

Thank you

[Alyson.hiatt@yahoo.com]

No problemo