One disadvantage of using tidal power is that it ____
a. has high operating costs.
b. requires a large amount of man power.
c. cannot sustain the world's needs.
d. adds pollutants to the air.
e. utilizes technology that is cost prohibive
c
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During parts of the Late Paleozoic the northern hemisphere continental masses were glaciated
a. True b. False
Who proposed the concept of continental drift—a precursor to plate tectonics?
a. James Hutton b. William Smith c. Charles Darwin d. Abraham Werner e. Alfred Wegener
Nuclear wastes are stored both at the sites of power plants and at special facilities maintained by the Department of Energy. What is the approximate amount of waste stored on site at power plants?
A) 500 metric tons B) 5000 metric tons C) 50,000 metric tons D) 500,000 metric tons
A community that changes very little over time is said to have great
A. Connectedness B. Diversity C. Complexity D. Renewal ability E. Constancy