Question

6. Explain the formation of a sand dune. in 50-70 words​

Answer 1

Answer:

A dune is a mound of sand formed by the wind, usually along the beach or in a desert. Dunes form when wind blows sand into a sheltered area behind an obstacle. Dunes grow as grains of sand accumulate. Every dune has a windward side and a slipface.

Sand dunes are created when wind deposits sand on top of each other until a small mound starts to form. Once that first mound forms, sand piles up on the windward side more and more until the edge of the dune collapses under its own weight.These are the barchan, transverse, blowout, linear, and composite dunes. Although it is sometimes easier to see different dune types from the air, some deserts have only one predominant type

Hope this helps you

Answer 2

A dune is a mound of sand formed by the wind, usually along the beach or in a desert. Dunes form when wind blows sand into a sheltered area behind an obstacle. Dunes grow as grains of sand accumulate.

Every dune has a windward side and a slipface. A dunes windward side is the side where the wind is blowing and pushing material up. A dunes slip face is simply the side without wind. A slipface is usually smoother than a dunes windward side.

A collection of dunes is called a dune belt or dune field. A large dune field is called an erg. The Skeleton Coast Erg in Namibia extends 2-5 kilometers (1-3 miles) in length and across a width of 20 kilometers (12.7 miles).