Most subduction-derived magma never reaches the surface. However, what is formed if this type of magma reaches the surface of a continent?
A. basalt fissure
B. lines of calderas
C. belts of volcanoes
Answer: C
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The first core regions of the world-system were the trading hubs of
A) Italy, Greece and Spain. B) Portugal, Spain and North Africa. C) Austria, Hungary & Germany. D) Holland, England & France. E) Japan, Korea and China.
The direction of ground-water flow between any two locations in an aquifer is determined by comparing the total ________ of the water at each location
A) elevation B) pressure C) energy D) volume
Mistletoe (Phoradendron spp.) infest many taxa of plants, often causing the branches of the host species to become swollen and distorted and making the trees more susceptible to insect infestations This is an example of which symbiotic relationship?
A) parasitism B) mutualism C) commensalism D) amensalism E) synnecrosis
Which of the following is NOT a possible source of water contamination?
A. dry cleaners B. farms C. houses D. rocks that have been mineralized by natural processes but not mined E. All of these are possible sources of contamination.