Which force is responsible for the direction of the Earth's ocean currents?
A. prevailing winds
B. rising warm air
C. convection currents in the mantle
D. moon gravity effects
Answer: A
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This type of air will keep rising after an initial upward push:
A) statically stable air. B) statically unstable air. C) statically neutral air. D) air that is colder and denser than surrounding air.
Which one of the following represents a way to reduce point-source pollution contributing to cultural eutrophication?
A) Increase the use of vegetated waterways B) Increase the use of contour farming and crop rotation C) Remove nutrients from sewage-treatment effluents D) Include runoff detention ponds in subdivisions
Oceanic crust is primarily composed of ________
A) obsidian and pumice B) granite and diorite C) basalt and gabbro D) basalt and granite
What is a major difference between the phosphorus cycle and the water, carbon, and nitrogen cycles?
A. The phosphorous cycle is much faster than the others. B. The phosphorous cycle does not include the atmosphere but the others do. C. The phosphorous cycle makes use of living organisms but the others do not. D. The phosphorous cycle is able to create new energy. E. The phosphorous cycle has not been impacted by human activity.