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Desert Pavement: is a desert surface covered closely packed, interlocking angular or rounded rock fragments of pebble and cobble size.

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What is a(n) smooth, polished rock that has been abraded by the wind?

A. Blowout
Bajada
C. Inselberg
D. Ventifact

Why is it so difficult for wind to pick up clay-sized particles?

A. They are too large for the wind to carry
B. The wind has a near-zero velocity closest to the surface and can't pick them up
C. The clay particles are often buried under larger sediments
D. There is too much clay to carry

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Wind can transport sediments through different ways, which are:

A. traction of small pebbles
B. saltation of sands and silts
C. suspention of silts and calys
D. dissolution of ions

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Most of our present knowledge about the wind's ability to erode and transport sand comes from the 1920s to 40s work of Ralph Bagnold in the deserts of North Africa.

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