What have been some of the causes of the increased amount of oil found in the ocean? What is the
largest source of additional oil? What will be an ideal response?
ANS:Answer
should include:
? Oil has always been naturally present in the ocean, but it has been on the rise.
? More than half of the world's oil is transported on the ocean each year. Since the
increased transportation has occurred, there have been oil spills in the ocean. They are
not always large enough to warrant the news, but this is not the main source of increased
levels of oil found in the ocean.
? Some oil is released during the loading, discharging, and flushing of the tanker ships
themselves. This accounts for 8% of the oil in the ocean.
? Most of the oil that gets added to the ocean each year comes from the runoff of city
streets. This is perhaps the most dangerous addition of oil to the ocean. The oil has
carcinogenic properties in this form.
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Which of the following is true of divergent and convergent plate movement?
A) The direction of plate movement is the same. B) Convergent plate movement is less symmetrical than divergent plate movement. C) Material is destroyed with both plate movements. D) Both plates have boundaries.
Thailand's prospects for addressing current environmental problems are
A) serious but more hopeful because of slower population growth. B) worse because of the decline in population and decline in per capita income. C) very good because much less land is needed for agriculture. D) very good because air and water pollution have declined along with population growth.
The Hawaiian mantle plume is a classic example of a long-lived mantle plume being used to demonstrate how the motion of a tectonic plate has changed over time. Which hot spot would be an even better indicator of the Pacific plate's motion over time?
A) Cape Verde mantle plume B) Easter Island C) Yellowstone D) Caroline E) Pitcairn
In all humid tropical climates,
a. summers are never dry. b. winters are never dry. c. Both statements are correct. d. Neither statement is correct.