What percentage of the residents of dispersed urban areas in the United States drive alone to work every day?
A. 5%
B. 16%
C. 34%
D. 52%
E. 76%
Answer: E
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What term describes the highest rate at which a renewable resource can be used indefinitely without reducing its available supply?
A. conservation B. sustainable yield C. preservation D. perpetual resource E. degradation
Warming temperatures have accelerated the thawing of Gelisols. This efffect is of particular concern because
A) Gelisols contain about half of the pool of global carbon in the form of frozen carbon dioxide and methane and their release into the atmosphere could further affect warming climate. B) Gelisols are an important soils for growing speciality cold weather crops. The thawing of the Gelisols will adversely impact this lucrative market. C) Gelisols are the youngest, least developed soils on the planet. Warming will further stifle the horizontal development of these soils. D) as the permafrost melts, the meltwater will runoff, further contributing to global sea-level rise.
Early Earth was hot because ________
A) gravitational collapse generates heat B) a combination of collisions and radioactive decay produced heat C) there was still heat from the original big bang D) the moon's formation from an giant impact produced heat E) the Sun was much larger and heated the early planet
Which Latin American or Caribbean country leads coffee production in the world?
A) Colombia B) Brazil C) Peru D) Honduras E) Costa Rica