Another name for a nutrient cycle in an ecosystem is a
A. menstrual cycle.
B. hydrogen cycle.
C. diurnal cycle.
D. biogeochemical cycle.
Answer: D
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Climate depends on
A. elevation. B. latitude. C. ocean currents. D. all of these
Which of the following was not an impact of the Mount Pinatubo eruption in June 1991?
A) A decrease in atmospheric aerosols B) Injection of 15 - 20 million tons of sulfur dioxide droplets into the stratosphere C) Worldwide transport of aerosols D) A temporary average cooling of 0.5° C (0.9° F) E) Increase in atmospheric albedo
Earthquakes with a very deep focus are usually located along ________
A) a divergent plate boundary such as the Mid-Atlantic Ridge B) a convergent boundary such as the Peru-Chile trench C) a hot spot chain such as the Hawaiian Islands D) a transform boundary such as the San Andreas
In an advancing glacier
A. ablation exceeds accumulation. B. basal sliding always occurs. C. accumulation exceeds ablation. D. accumulation equals ablation.