The steep side of a sand dune is called the ______.

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Multiple Choice

The steep side of a sand dune is called the ______.

Explanation:
The steep side is the slip face. Sand is moved up the windward side until the slope reaches the angle where loose sand becomes unstable, and gravity causes an avalanche down the leeward side. This rapid downslope movement builds the steep face known as the slip face. The top edge is the crest, the downwind side as a whole is the leeward slope, and the bottom edge where the dune meets the ground is the dune toe.

The steep side is the slip face. Sand is moved up the windward side until the slope reaches the angle where loose sand becomes unstable, and gravity causes an avalanche down the leeward side. This rapid downslope movement builds the steep face known as the slip face. The top edge is the crest, the downwind side as a whole is the leeward slope, and the bottom edge where the dune meets the ground is the dune toe.

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