Ferromagnesian minerals such as pyroxene, amphibole, biotite, and olivine are chemically altered in the presence of ________.
A. mica
B. argon
C. helium
D. oxygen
E. quartz
Answer: D
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The primary difference between renewable resources and nonrenewable resources is ____.
A. how easily each can be discovered B. the available amount of each resource C. the length of time it takes for each to be replenished D. how fast each is being consumed E. how quickly each can produce electricity
Which of the following stages of a tropical cyclone's "life" is least energetic?
A) tropical storm B) tropical depression C) typhoon D) supertyphoon E) tropical disturbance
Australia accounts for over ________% of the world's alumina
A) 20 B) 40 C) 60 D) 80
Based on Congressional priorities with respect to immigration, one might assume that the largest numbers of recent immigrants to the United States are
A) unauthorized immigrants. B) political refugees. C) relatives of U.S. residents. D) talented professionals. E) guest workers.