One limitation of wind power is that it ________
A) produces radioactive wastes
B) involves mining
C) produces water pollution
D) is intermittent
E) uses fossil fuels to generate electricity
Answer: D
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Despite the ocean's vast size, it is unlikely that is will be able to provide enough food to alleviate
malnutrition and starvation in the world. Indicate whether the statement is true or false.
The vapor pressure of a volume of air depends on:
A) the temperature of the water vapor molecules. B) the density of water vapor molecules. C) A and B. D) none of the above
The greatest areas of marine biodiversity are located ____.
A. in the sunlit region of the ocean B. in the surface region of the ocean C. under the polar ice caps D. in the open ocean E. in coral reefs
What group of animals were the first to leave the ocean to become the first amphibians?
A) trilobites B) salamanders C) horn-beaked Cephalopods D) lobe-finned fish