The world's largest river (in volume) is the
A. Nile
B. Congo
C. Amazon
D. Mississippi
C. Amazon
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The reintroduction of wolves into the Yellowstone ecosystem has been considered a success because
A. the wolves are thriving. B. local ranchers fear that wolves will attach cattle. C. ecotourism has decreased. D. biodiversity of the ecosystem has been re-established and sustained. E. global warming has ceased.
Which of the following geologic situations is most likely to contain significant oil concentrations?
A) 1.1-billion-year-old rocks that accumulated in the vicinity of a divergent plate boundary B) 200-million-year-old rocks that have been exposed by uplift in a subduction zone C) 300-million-year-old rocks that accumulated in a subsiding sedimentary basin D) 150-million-year-old rocks that are flat lying and unfaulted
In many megacities of the developing world, rapid urbanization has produced
A) policies promoting smart growth with public transit systems. B) millions of city-dwellers living on rented property in huge shantytowns and appalling conditions. C) a counter trend of fleeing the cities for rural areas. D) increased life expectancy and better public health than was available in rural areas.
What is meant by the term enrichment factor?
A. The degree to which a mineral resource is concentrated in the crust. B. The degree to which a mineral resource is found in a typical rock. C. The amount found in a useful product. D. The amount needed to produce a useful product.