Which statement about arsenic is false?
A)It is odorless and tasteless.
B)It contaminates groundwater via natural processes.
C)It harms the nervous system and may cause birth defects.
D)Reducing the amount of arsenic in water will increase the cost of water.
E)Arsenic concentrations are uniform across the U.S.
E
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Who was responsible for spreading the idea of the nation-state across Europe in the early nineteenth century?
A) King Louis XVII B) Napoleon Bonaparte C) Pope Pius VII D) Admiral Horatio Nelson
Tar sands
A. must be mined. B. can be shipped through pipelines. C. are a newly discovered source of oil. D. produce oil less expensively than fracking.
Using the image above, label the five soil horizons from the surface downward
A) E Horizon B) C Horizon C) O Horizon D) B Horizon E) A Horizon 1) A 2) B 3) C 4) D 5) E
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