Hoover Dam was built in the 1930's on the Colorado River, and at that time was extremely important as an employment project
The United States was just coming out of the Great Depression and it was viewed as a life-saver by thousands of people across the country. Now this dam is 80 years old. Drawing from information in this chapter about aging dams, what is a severe problem that could be expected?
What will be an ideal response
Aging dams typically fill up with mud and silt within 50 years.
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Linnaeus was the first to start classifying organisms
a. True b. False
The rock type that is the source of most commercial asbestos is ____
A)serpentine B)amphibole C)pegmatite D)hematite E)biotite
What is a floodplain? How does it form?
What will be an ideal response?
Both P-waves and S-waves can pass through ________.
A. brittle zones B. solid rock and liquids C. elastic zones D. liquids E. solid rock