The number of electrons delivered daily to an average American home by an average power utility in the mid-1980s was
A) zero.
B) 110.
C) 220.
D) billions of billions.
E) none of the above
A
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Energy return on investment (EROI) is a method for evaluating the feasibility of developing an energy source. (The amount of energy produced by the source must be larger than the amount of energy used to obtain and use the source.) Which one of the following is typical for the EROI for a source?
A. New fossil fuel sources generally have a lower EROI than older ones. B. Hydroelectricity has a low EROI. C. Ethanol from corn or sugar cane has a high EROI. D. Most renewable sources have a higher EROI than fossil fuel sources.
________ refers to the mechanism of evolution in isolated areas that occurs in response to otherwise unfilled ecological niches
A) Diversification energy B) Acclimation spread C) Adaptive radiation D) Adjustive emission
Which of the following whales feeds by moving through surface waters with their mouths open, skimming for small surface-dwelling prey?
A) Blue whale B) Gray whale C) Humpback whale D) Minke whale E) Right whale
A continuous mass of ice covering a large landmass is known as a
A) tidal glacier. B) mountain glacier. C) continental glacier. D) valley glacier