A dark, shiny coat of iron and manganese oxides on pebbles, stones, and larger outcrops is known as ________
A) a reg
B) desert varnish
C) pediment
D) a hamada
E) an erg
Answer: B
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The jet streams in the United States generally flow from west to east because of
A) ocean currents off the Pacific and Atlantic coastlines. B) convection currents between the troposphere and stratosphere. C) rotation of the Earth. D) high pressure systems generated by the sun striking the North American continent.
The type of rock shown in this photograph is
A. conglomerate. B. shale. C. sandstone. D. breccia.
Plants can reduce the risk of flooding by consuming water, keeping soil loose and permeable and slowing surface runoff.
Answer the following statement true (T) or false (F)
A higher threshold value applied to a flow accumulation raster typically result in a ________ stream network:
A. less dense B. denser