A sand dune is a hill made out of sand created by a series of winds. They form in Different shapes and sizes

- Wind blows by the area picking up sand particles. - As the wind loses energy it drops the sand suspended within it -Over a long period of time( also with varied winds and textures of sand ) distinctive dune shapes are created

A crescent-shaped sand dune with “horns” of the dune pointing downwind

A giant ripple-like sand dune formed at a right angle to the direction of the prevailing winds

Dispositional features made of hills of sand that are stabilized by vegetation at each end

Dispositional feature formed when wave action drags sand along the shoreline as waves break at angles on the earths surface

A sand that resembles a star because the wind direction is variable

- Land development and recreational uses -Alteration, people protecting sand from coming into residential areas - building dirt jumps on them Affecting Protecting Some countries have created groups to protect sand dunes ( sand dune stabilization )

-Provides food for organisms -Provides camouflage - Re shapes the land -Destroys vegetation - Excessive erosion