The city of Savannah, Georgia is situated close to the Atlantic Ocean and gets its municipal drinking water from groundwater. In recent years, the groundwater has become increasingly salty. Why has this occurred?
A. intrusion of salt water from overpumping
B. storm surges from hurricanes
C. salt placed on roads to keep the ice down in the winter
D. drilling into salt formations by private companies
Answer: A
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Construction of the Three Gorges Dam in China has resulted in
A. inundation of only a trivial amount of farmland, because it is sited in a narrow gorge walled with granite bedrock. B. increased damage from the frequent flooding of the Yangtze River. C. displacement of more than 1.3 million people. And increased seismic and landslide activity in the area. D. improved stability in banks of the Yangtze River downstream as a result of increased sediment load.
Which of the following are effects of ozone depletion?
a. increased photochemical smog b. reduced crop yields c. immune system suppression d. reduced phytoplankton populations e. all of these answers
The three basic divisions of an ophiolite sequence are ____
a. upper mantle, lower continental crust, and sedimentary rocks b. oceanic crust, continental crust, and lower mantle c. upper mantle, upper continental crust, and sedimentary rock d. upper mantle, oceanic crust, and sedimentary rocks e. sedimentary rocks, oceanic crust, and continental crust
Which of the following best matches the description?Decontamination and disassembly of a nuclear power plant.
A. transuranic waste B. radioactive half-life C. thermal pollution D. rem E. heavy-water reactor F. radiation G. moderator H. U-235 I. nuclear breeder reactor J. light-water reactor K. nuclear fission L. alpha radiation M. nuclear fusion N. gamma radiation O. decommissioning P. beta radiation