Question

How are plains formed ?
What are sand dune ?

Answer 1

Answer:

1. Plains may have been formed from flowing lava, deposited by water, ice, wind, or formed by erosion by these agents from hills and mountains.

2. A dune is a landform, and is a large mass of wind-blown sand. Dunes are most common in deserted environments, such as the Sahara, and also near beaches. An area with dunes is called a dune system. In physical geography, a dune is a hill of loose sand built by aeolian processes or the flow of water.

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Answer 2

• When wind blouse, it lifts and transports and from one place to another. when it stops blowing the sand Falls and gets deposited in low Hill like structures. these are called sand dunes.