Why does the ratio of oxygen 18 to oxygen 16 in the oceans increase during an ice age?
A) More precipitated water remains on land instead of running back to the sea.
B) There is a different kind of radioactivity occurring in the ocean at the colder world temperatures.
C) There is a different kind of radioactivity occurring on land at the colder world temperatures.
D) Sea water freezes into glaciers.
Answer: A
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The result of the 1997 Kyoto Summit was an international commitment to
A. reduce the number of oil spills. B. reduce emissions of greenhouse gases. C. reduce the amount rainforest logging. D. increase the amount of land placed in conservation easement.
During the Wisconsin part of the Pleistocene Epoch, the Antarctic ice cover was ________
A) the same as today B) slightly larger than today C) slightly smaller than today D) much larger than today E) much less than today
The Appalachians, the European Alps, and the Himalayas are examples of mountain ranges formed by
A) normal faults. B) divergent plate boundaries. C) faulting and folding. D) volcanic eruptions.
In the Public Land Survey System, ____________________ defines a point east or west of a principal meridian and ____________________ defines a point north or south of a base line
Fill in the blank(s) with correct word