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Neko [114]
3 years ago
11

Describe how sand dunes form and how dunes migrate

Biology
2 answers:
Jlenok [28]3 years ago
8 0
The wind is just strong enough to move the sand grains which were sorted by size by the wind. Heavier grains were left in place where as smaller grains were carried away. These grains kept moving till they were concentrated in one place usually up a hill. The grains climb the flat slope on the windward side and then fall off the steep side. The dunes may migrate slowly as this process continues, the grains at the upwind side climb the dune with the help of the wind and then fall down the downwind side.<span>
</span>
Monica [59]3 years ago
8 0
The wind is just strong enough to move the sand grains which were sorted by size by the wind. Heavier grains were left in place where as smaller grains were carried away. These grains kept moving till they were concentrated in one place usually up a hill. <span>The grains climb the flat slope on the windward side and then fall off the steep side.


~hope this helps!</span>
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