Which human activity is leastlikely to be a major threat to marine systems?
A. overfishing
B. sinking of ships to create artificial reefs
C. runoff of nonpoint source pollution
D. invasive species introduced by humans
E. habitat destruction from coastal development
Answer: B
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The period of a satellite, the time it takes for a complete revolution, depends on the satellite's
A) mass. B) weight. C) radial distance. D) all of the above E) none of the above
Determining specific, quantitative dates for rock units or events expressed in years before thepresent:a
relative dating b. absolute dating
It is estimated that roughly ________ or more of all material dumped at sea is dredged material from ports and waterways.
A. 35 percent B. 50 percent C. 75 percent D. 25 percent E. 10 percent
The location of the population in North Africa and Southwest Asia is most often dependent on access to oil
Indicate whether the statement is true or false