A dune is a landform composed of wind- or water-driven sand. It typically takes the form of a mound, ridge, or hill. An area with dunes is called a dune system or a dune complex.

What are sand dunes?

Sand dunes are hills of sand that are made by winds as they blow across deserts. The more powerful a wind is, the farther it can carry particles of sand before they drop to the ground. As they roll and bounce on the ground, these particles create small, wave-shaped ripples of sand.

What are sand dunes in simple words?

A sand dune is a hill of sand near the sea or in a sand desert.