Which of the following is true of the prime meridian?
A) It is used to determine latitude using lines that run east and west.
B) It was first used in the 1500s at the time of initial circumnavigation voyages.
C) It was not established until 1884 and is centered on an observatory near London.
D) It is that place on Earth where the days officially change.
C
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Which one of the following statements is true?
A. Despite infrequent rainfalls, erosional and depositional features of running water are important in desert landscapes. B. Deserts and dry lands are concentrated in areas of ascending air masses and relatively low atmospheric pressures. C. Desert landscapes are monotonous, relatively flat areas covered to various depths with sand.
To increase the temperature of 1 gram of ice-cold ice to 80°C requires
A. 800 calories. B. 540 calories. C. 40 calories. D. none of the above
The economic value of biodiversity and ecosystems services is difficult to assess because
A. nobody has studied them. B. we only recognize their value when they are gone. C. we don't directly pay for them. D. All of the statements are correct.
Monitoring wells around a sanitary landfill are used to determine
A. if artesian conditions occur. B. if leachate is escaping. C. if the water table is declining. D. if an aquifer is confined.