A sand dune typically has a crescent, ridge or mound-like shape. Formed by wind in desert regions, dunes have a gentle slope on one side and a steeper slope on the other. Their shape changes over time due to shifting winds.
Class 7 Social Science Chapter 1 Geographical Diversity of India question answer
Class 7 NCERT Social Science India and the World: Land and the People Chapter 1 Geographical Diversity of India
Sand dunes are hills of loose sand formed by wind action in deserts. They usually appear in crescent, dome or linear shapes depending on wind direction and speed. A typical dune has a gentle windward side and a steep leeward side. These shapes aren’t fixed and can move or grow over time. The Thar Desert has many such dunes, which help geographers understand wind patterns and natural landscape evolution in arid environments.
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