Which of the following human activities has been most problematic for wetlands around the world?
A) Boat traffic that causes excess oil and gas to be dumped in waterways
B) The alteration of ocean current circulation resulting in erosion of wetlands
C) Eutrophication caused by humans dumping pollutants into water
D) The draining and alteration of wetlands for agriculture and urban development
D
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A meteorite is
A) a small comet B) a large meteoroid C) a meteoroid that has entered the Earth's atmosphere D) a meteoroid, asteroid, or comet that strikes the Earth's surface
On this map, identify which letter is over a mid-ocean ridge.
A. A B. B C. C D. D E. Feature is not labeled.
In 1596, the first person to write about the possibility of continental drift was ________
A) Hess B) Darwin C) Ortelius D) Einstein E) Aristotle