Q1. How are sand dunes formed? *types of chemical weathering
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These dunes form when complex wind patterns alternate direction and change the way sand is piled onto the dune. ... Weathering is the physical and/or chemical breakdown of surfaces due to wind, water, or ice. Erosion is the process of moving the broken down material from one place to another via wind, water, or gravity.
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the dunes are formed by the winds
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