Some minerals have the same chemical composition but different crystal structures, a phenonomn termed___.
Fill in the blank(s) with the appropriate word(s)
polymorphism
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At present, the world population is growing at about 8.5 percent per year for a doubling time of 20 years.
Answer the following statement true (T) or false (F)
Demand for health care and education has grown because
A) the aging baby boomers demand more health care services. B) increasingly sophisticated technology requires that workers be better educated. C) these services are so inexpensive. D) all of the above. E) A and B only.
Sea level rise is caused not only by the melting of polar and glacial ice but also by
A) greatly increased rainfall over oceans. B) freshwater being forced from groundwater into rivers and then to the oceans. C) the fact that water expands in volume as it warms. D) the effects of hurricanes and typhoons.
Where has overfishing been particularly acute? In other words, where is the problem the worst?
A) Indian and Arctic oceans B) North Atlantic and Arctic oceans C) North Atlantic and Pacific oceans D) South Atlantic and Indian oceans E) South Atlantic and Arctic oceans