Maritime tropical masses reach North America from all of the following areas except
A) the northern Pacific.
B) the eastern Pacific.
C) the Gulf of Mexico.
D) the Middle Atlantic.
Answer: A
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A. nitrogen B. oxygen C. both D. neither E. Gases cannot form solutions.
Which two processes form most sinkholes?
a. solution and collapse b. carbonation and oxidation c. weathering and mass wasting d. acid mine drainage and evaporation e. hydration and hydrolysis
Of all the threats to biodiversity, the single greatest threat is ________
A) invasive species B) pollution C) habitat fragmentation D) habitat destruction E) overharvesting species
The "sphere" that intersects with all of the other spheres is the
A. lithosphere. B. biosphere. C. hydrosphere. D. atmosphere.