Underground water is a weak ________ acid
A) citric
B) sulfuric
C) tannic
D) nitric
E) carbonic
Answer: E
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Which of the following is true of oil?
A) Oil was not produced in the United States until the middle of the twentieth century B) Oil was a minor resource until the diffusion of motor vehicles early in the 1900s C) Oil was discovered by Baron von Drusenberg of Austria in the later eighteenth century D) Libya has the world's largest proven oil deposits E) The United States imports about 5 percent of the total annual oil it consumes
Which of the following species has been impacted by climate change?
A. Polar bears B. Bowhead whales C. Pacific salmon D. None of the species have been impacted E. All of the species have been impacted
Which of the following macromolecules fuels almost all living cells?
A) proteins B) carbohydrates C) RNA D) DNA
The 1883 Krakatoa, Indonesia eruption is more accurately classified as an
A. phreatic eruption. B. effusive eruption. C. pyroclastic eruption. D. None of the choices are correct.