The theory of plate tectonics proposes that the _____ float on the Earth's _____.
A ) spreading centers, core
B ) plates, asthenosphere
C ) plates, magnetosphere
D ) supercontinents, crust
B ) plates, asthenosphere
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Which of the following processes would decrease the amount of salinity in seawater?
A. icebergs melting B. evaporation C. formation of sea ice D. global temperature increase
The problems of where to locate new landfills has
A) increased transportation costs. B) reduced the use of incinerators. C) reduced the amount of recycling. D) increased the total amount of MSW.
Natural levees are commonly found in association with ____
a. braided streams and lava flows b. meandering streams and talus c. meandering streams and debris flows d. braided streams and rockslides
One of the ________ effective ways to stabilize populations is to ________.
A. Least; provide free contraceptives B. Least; decrease child mortality C. Most; expect mandatory sterilization D. Most; provide free contraceptives E. Most; decrease child mortality