Which of the following atmospheric conditions is most conducive to the formation of hurricanes?
A. warm air aloft
B. weak upper-level winds
C. dry surface air
D. diverging surface winds at the surface
Answer: B
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Since 1990 Russian death rates have risen and life expectancy has fallen. What are the major underlying causes for these major demographic changes?
What will be an ideal response?
A rock sample containing an isotope with a half-life of 12 million years has an initial mass of 72 grams. How much of the daughter isotope will be present after three half-lives?
A)4.5 grams B)9 grams C)18 grams D)54 grams E)63 grams
In addition to the sheer volume, one of the greatest risks of adding e-wastes into landfills is
A) the generation of large volumes of biogas. B) a danger that CRTs will result in huge explosions. C) the leaching out of heavy metals into groundwater. D) the tremendous amounts of heat generated when e-waste decays.
Ocean water originated mainly from degassing of the Earth's interior.
Answer the following statement true (T) or false (F)