Which of the following is the boundary current located off the east coast of the U.S.?
A. Canary
B. Gulf Stream
C. Kuroshio
Answer: B
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Which of the following has been the result of building very tall smokestacks at coal burning power plants?
A. acidified lakes hundreds of miles away B. increased pollution levels near the factory C. decreased pollution levels in downwind areas D. healthier forest ecosystems downwind
Which of the following is NOT a characteristic of crystals and clasts evaluated to classify a rock?
A. crystal/clast shape B. crystal/clast density C. crystal/clast composition D. crystal/clast size
Which one of the following is a trait that increases the chances of survival for an endangered species?
A) Large size B) A food source consisting of a single species C) Widespread distribution D) Small number of offspring
The time needed for a typical atom in an oceanic plate to complete a plate-tectonic cycle is ________ years.
A. about 10 million B. about a million C. about a hundred thousand D. less than 500 E. in excess of 250 million