| 1. | Which term does not belong with the others _ cirque, tarn, barchan?
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| 2. | The orientation of the barchan dunes suggest that they were generated by northeasterly winds.
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| 3. | Liu Hsin Crater shows some barchan dunes.
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| 4. | I happened to be looking at this digital terrain model of a barchan on Mars today.
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| 5. | What type of dunes are they-Barchan, Transverse, Longitudinal, Concave, Parabolic or Star?
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| 6. | The team established that the region contributes substantially to global atmospheric dust due to its diatomite and mega-barchan dunes.
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| 7. | When there are perfect conditions for producing sand dunes, steady wind in one direction and just enough sand, a barchan sand dune forms.
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| 8. | If the prevailing wind then becomes dominant for a lengthy period of time the dune will revert to its barchan form, with one exaggerated wing.
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| 9. | Small simple barchan dunes and large mega-barchans are common at the margins of Olympia Undae and in areas where the sand cover is thin.
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| 10. | Barchan dunes are produced by strong winds blowing across a level surface, and are crescent-shaped with the concave side away from the wind.
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