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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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
Ocean water originated mainly from degassing of the Earth's interior.
Answer the following statement true (T) or false (F)
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.
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?