Which one of the following is NOT a negative impact of building hydroelectric dams?
A. change in the temperature of the water
B. flooding vast areas of land
C. silt is trapped behind the dam
D. The electricity produced is more expensive than nuclear or coal power plants.
Answer: D
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Compare the thickness of pelagic sediments in the Pacific Ocean to that of the Atlantic. What reasons
account for the differences? Using information from Chapter 4, would the type of margin have an effect? Why or why not? What will be an ideal response?
Answer the following Volcanoes questions.
1. Calculate the relief for each volcano by subtracting the lower elevation on the transect line from the higher elevation. Enter the relief into Table 20.1.
2. Calculate the length along each transect between the contour lines you used to measure the relief, using the scale bar. You can also calculate the length of each transect by measuring the transect with a ruler and using the written scale to convert it to feet. Enter the length into Table 20.1.
3. Calculate the slope in percentage by dividing the relief by the length. Enter the slope into Table 20.1.
By how much is global temperature predicted to rise over the next century?
What will be an ideal response?
Highs, lows, fronts, and conflicting air masses frequent the:
a. prevailing westerlies. b. polar region. c. doldrums. d. horse latitudes.