The slope of the upwind side of a sand dune is ___ the angle of repose.

Question

Quizplus · Accepted Answer

The angle of repose is the maximum angle at which loose material remains stationary without sliding downslope. This angle varies for different materials and is generally around 30-35 degrees for sand. The slope of the upwind side of a sand dune is typically less than the angle of repose, as the sand grains are being deposited by the wind and tend to accumulate at a gentler slope. Therefore, choice C (less than) is the best answer.

The Slope of the Upwind Side of a Sand Dune