________ is a hard shiny coating of dark iron and manganese oxides and clay minerals that form on rock surfaces in arid environments.
A. Corona
B. Deflation coating
C. Ventifact
D. Desert armor
E. Desert varnish
Answer: E
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How and where do alluvial fans form? What will be an ideal response?
Fire history in an open pine woodland ecosystem would be best determined by ________
A) ambient air temperature B) soil chemistry C) charcoal in the soil D) tree ring scars E) the density of vegetation
What is the core argument in the concept "tragedy of the commons"?
A) Monetary systems are often manipulated by elites. B) Governments will intervene when it is in their direct interest to do so. C) Resources that are shared among several groups are ruined by individual actions. D) Overpopulation is the result of lack of family planning methods. E) Famine is likely to result after an isolated area experiences crop failure.
A bedrock remnant held up by a resistant caprock, such as found in the Colorado Plateau area of the southwestern U.S., is called a(n) ____________________ if it is taller than it is wide
Fill in the blank(s) with correct word