Landforms Dunes

How does a sand dune form?

• sediments collects at the mouth of a river or ocean

• wind deposits sand and sediment

• a narrow deep valley is cut by a river through rock

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What processes build sand dunes?

• erosion and weathering

• deposition and weathering

• erosion and deposition

• Weathering

Tags

NGSS.MS-ESS2-2

Where do sand dunes form?

• valleys

• plains

• canyons

• deserts and oceans

How could students best model the formation and movement of dunes?

• Pour water over piles of sand.

• Slowly drip wet sand into a tub of water.

• Use a spoon to dig a hole in a tray of sand.

• Use straws and blow piles of sand.

Sand dunes are created when sand is moved and deposited by –

• strong, persistent winds.

• slow moving sheets of ice.

• frequent lava flows.

• powerful ocean currents.

What is the process of erosion?

• breaks it

• takes it

• drops it

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Tags

NGSS.MS-ESS2-2