Which of the following is NOT a main type of silicate structure?
A. sheets
B. frameworks
C. double chains
D. triple chains
E. single chains
Answer: D
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According to Halford Mackinder's Heartland theory, the "geographical pivot" from which world conquest could be controlled includes the area of
A) Eurasia, including Iran, Afghanistan and Central Asia. B) Europe from Italy to Holland. C) North America from Chicago to Montreal to Washington, D.C. D) the Arabian peninsula. E) Southeast Asia, including Indonesia.
Which of the following is occurring in the Snake River Plain of southern Idaho?
A) Water from rivers soaks into the ground, causing the rivers to disappear (be lost). B) A large amount of water flows underground. C) Huge springs result where groundwater flows onto the surface. D) All of these are occurring.
Describe the heaving process that results in soil creep
What limits the use of geothermal energy?
a. Few cities lie near geothermal resources b. The geothermal heat pump cannot be used for a single house c. The energy transformation from heat to electricity is not efficient d. Significant energy is needed to utilize and transform geothermal