One side of a sand dune is typically steeper than the other side. The slope of the steepest is controlled by the angle of repose for sand-which has a value that is typical for most materials. This angle is about ________.
A) 5 degrees
B) 15 degrees
C) 34 degrees
D) 78 degrees

Question

Quizplus · Accepted Answer

The angle of repose for sand is around 34 degrees, which means that the steepest slope of a sand dune will usually have an angle close to this value. Option A and B are too low, while option D is too high to be correct.

One Side of a Sand Dune Is Typically Steeper Than