The largest part of a(n) ________ is its long, glowing tail, a narrow column of dust that may extend for 100 million km.
A. meteor
B. shooting star
C. planet
D. comet
E. asteroid
Answer: D
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The transportation, financial and communication hub for all of East Africa is
A) Johannesburg B) Lagos C) Mombasa D) Nairobi E) Addis Ababa
The Kyoto Protocol ________
A) required equal concessions from all countries involved in greenhouse gas emission B) increased federal funding for controlling greenhouse gas emissions from U.S. power plants C) was intended to reduce emissions of six greenhouse gases to levels lower than those of 1990 D) required increases in nuclear power generation E) would have resulted in overall increases in greenhouse emissions
For what time span does radiocarbon apply?
What will be an ideal response?
Not much dolomite is observed to be precipitating from solution in modern geologic environments. This probably means that:
a. the conditions were more conducive to precipitation of dolomite in the geologic past b. dolomite must have formed from calcite after deposition by the replacement of calcium by magnesium in the mineral structure c. dolomite is probably forming today, but we haven't located the environments where it is taking place d. dolomite must have formed from gypsum after deposition by the replacement of calcium by magnesium in the mineral structure