The problem of acidic air emissions and acid rain are worst in
A) Africa.
B) North America and Western Europe.
C) Asia.
D) Australia.
E) Antarctica.
Answer: C
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The pH scale is the logarithmic measure of hydrogen ion concentrations. Indicate whether the statement is true or false
Large-scale fertilization of the ocean to stimulate blooms and draw down carbon have been proposed using ________.
A. iron B. urea C. phosphorus D. All of these choices are correct. E. None of these choices is correct.
The hypothesis of continental drift was not widely accepted because
A. there was no mechanism to move continents through the oceanic crust. B. the hypothesis required long, narrow land bridges that did not exist. C. the hypothesis required that the entire Earth was once frozen. D. All of these were reasons the hypothesis was not widely accepted.
Conchoidal fractures are indicative of the mineral ________
A) muscovite B) quartz C) fluorite D) pyroxene