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
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.
Which of the following best describes an “artesian” type of well?
A. the well is horizontal and the water table is perched
B. the water is warm, saline and recharged by a losing stream
C. water rises above the top of the aquifer without any pumping
D. pressurized groundwater rises from a deep, unsaturated aquifer
Which of the following situations would be the best aquifer?
A. high porosity and low permeability
B. low permeability and high porosity
C. high porosity and high permeability
D. low porosity and low permeability
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