Dune

High school (ages 12+)
Geography

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/dune

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the primary formation agents?Wind (aeolian processes) and water (fluvial and marine processes)
2. What is the subaqueous dunes?Form underwater on riverbeds and the sea floor due to water currents
3. What is a dune and how does it form?A dune is a hill made of sand that forms when wind or water moves sand and then it settles when the wind slows. The windward side slopes gently while the leeward side is steeper and can slide down when it gets too steep.
4. Why do dunes move and change shape?Dunes move because wind keeps pushing sand uphill, and when the slope gets too steep the sand slides down. This sliding and piling up makes the whole dune shift over time.

Aeolian Processes: Geological processes driven by the action of wind, including erosion and deposition of sediment.
Fluvial Processes: Geological processes associated with rivers and streams, including sediment transport and deposition.
Angle of Repose: The steepest angle at which a pile of granular material, like sand, remains stable without sliding.