Question
How do sand dunes move?
Question 5 options:
wind carries sand up the windward side of the dune and drops it over onto the leeward side
wind carries sand up the leeward side of the dune and drops it over onto the windward side
ocean waves and gravity move the dunes
sand dunes don't move
Question 5 options:
wind carries sand up the windward side of the dune and drops it over onto the leeward side
wind carries sand up the leeward side of the dune and drops it over onto the windward side
ocean waves and gravity move the dunes
sand dunes don't move
Answers
GPT-4o mini
The correct option is:
**wind carries sand up the windward side of the dune and drops it over onto the leeward side.**
This process is known as saltation, where wind lifts sand grains up the dune's slope and then they slide down the leeward side due to gravity, causing the dune to migrate in the direction of the prevailing wind.
**wind carries sand up the windward side of the dune and drops it over onto the leeward side.**
This process is known as saltation, where wind lifts sand grains up the dune's slope and then they slide down the leeward side due to gravity, causing the dune to migrate in the direction of the prevailing wind.