In the interior of continents the earth's crust is typically about 40km thick and the elevation is near sea level. Most earth materials expand when heated, lowering their density
During rifting continental margins are heated but cool as sea floor spreading moves offshore from the continent. Thus, basic isostasy suggests that after rifting, a continental margin will ________.
A) subside B) rise slowly as erosion removes uplifted rocks
C) uplift D) remain near sea level
A
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Which of the following types of soil is least strongly influenced by its climate?
A) Entisol B) Aridisol C) Mollisol D) Spodosol
The European wild boar is considered an invasive species because it
A. competes for food with native endangered species. B. causes traffic accidents. C. provides game. D. controls pest populations of the Argentina fire ant. E. is a variety of the feral pig.
Like limestone, ________ is highly susceptible to subsurface erosion
A) gypsum B) sandstone C) granite D) shale E) basalt
The gridpoint model breaks the atmosphere into a series of
A) concentric rings. B) cylinders. C) boxes. D) octagons. E) hexagons.