The three kinds of plate convergence are
A. oceanic-oceanic, continental-oceanic, and continental-continental.
B. crashing, scraping, and splitting.
C. transform, divergent, and convergent.
D. subduction, volcanic arc-building, and trench building.
Answer: A
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Erosion of unvegetated land adjacent to lakes and rivers causes siltation.
Answer the following statement true (T) or false (F)
Atmospheric carbon dioxide concentrations: [INSERT FIGURE 1-6. NO CAPTION]
A) have decreased over the last few decades. B) increase with height above the tropopause. C) have not been reliably measured for the northern hemisphere. D) are highest in early spring.
Although hydroelectric dams generate electricity without producing greenhouse gases, they ________
A) are short-lived structures that have to be rebuilt about every 20 years B) alter water control in ways that make it more difficult to irrigate crops C) contribute only about 5% of the electrical power throughout the world D) eliminate farmland, wildlife habitats, and sometimes even villages in regions that are flooded E) still produce more greenhouse gases per unit of electricity produced than coal power plants
The modified Mercalli scale ____
a. measures earthquake magnitude b. measures energy released in an earthquake c. uses the letters A through F d. uses Roman numerals