An earthquake of magnitude 7.0 has an amplitude ____________________ times as large and releases
____________________ times as much energy, respectively, as a magnitude 6.0 earthquake. Fill in the blank(s) with the appropriate word(s).
ten, thirty
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Describe composite volcanoes. How do they differ from shield volcanoes and cinder cones? What will be an ideal response?
Which of the following reactors produces heat and a new supply of the radioactive isotope, Pu-239?
A. nuclear breeder reactor B. pressurized-water reactor C. boiling-water reactor D. light-water reactor
Which of the following would not be used to describe polyculture?
a. Plants mature at various times. b. The plot of land is left unmanaged for long periods of time. c. Fertilizer use and water use are reduced. d. Pesticides are rarely needed. e. It produces higher yields than high-input monocultures.
_______ a term used to describe the practice of arranging villages and homes to promote maximum harmony with the natural and spiritual environments
Fill in the blank(s) with correct word