What conditions are necessary for the formation of sand dunes?
What will be an ideal response?
a) Strong, persistently blowing wind to transport sand and mold it into dunes.
b) An abundance of loose sand that wind can transport to form the dunes.
c) Absence or near absence of vegetation that slows down the wind and binds sediment to diminish the likelihood of sediment erosion and transport.
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The water temperature at the bottom of ocean trenches is very warm
a. True b. False
A "qanat" is an irrigation system, developed in Iran, that taps into groundwater through a series of gently sloping tunnels
Indicate whether the statement is true or false
Loess is _____
a. commonly deposited on the upwind margins of deserts b. composed primarily of gravel-size sediment c. primarily transported by eolian suspension d. primarily transported by surface creep e. deposited out of solution from desert stream water
You are in a boat and concerned about shallow water in a meandering river. Where should you aim your boat to find the deepest water?
A) midchannel B) on the outside of the curve, close to the cut bank C) along the inside of the curve D) It doesn't matter, as long as you remain a meter or two from either bank