The most abundant silicic volcanic rock is ________.
A. obsidian
B. basalt
C. rhyolite
D. andesite
E. tuff
Answer: C
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Why are ores so valuable?
A. They are sources of naturally occurring gold. B. They hold many clues to Earth's natural history. C. Metals can be efficiently extracted from them. D. They tend to occur in scenic mountainous regions.
Why does the latent heat of vaporization require so much heat energy?
a. The energy is needed to break the strong covalent bonds. b. The energy is required to stabilize bond vibrations. c. The energy is used to break the hydrogen bonds. d. All of these choices.
The two main zones within the E climate are:
A. Subarctic & Arctic B. Arctic & Cold C. Ice Cap & Tundra D. Greenland & Antarctic
The political scientist Samuel Huntington says that future conflicts will involve tension between civilizations. He would recognize which of the following as a civilization?
A) A country, or nation-state, like the United States, which has definite borders. B) A group of nations defined by ethnic group. C) A group of nations that has similar core values. D) A group of nations defined by continent.