The ____________________ of an earthquake on the Richter Scale is determined by measuring the
____________________ of the largest recorded seismic wave. Fill in the blank(s) with the appropriate word(s).
magnitude, amplitude
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A steep-walled, bowl-shaped depression formed on a mountainside by glacial erosion:a
moraine d. ice cap b. striation e. cirque c. varve
Burning fossil fuels, cutting down large forests, and not replanting the areas with trees will affect the global carbon cycle by
A) increasing atmospheric concentrations of carbon dioxide. B) decreasing atmospheric concentrations of carbon dioxide. C) increasing the geological production of fossil fuels. D) increasing levels of nitrification and reduce acid rain.
The relationship between the dung beetles and the disease-carrying flies is a type of
A) mutualism. B) commensalism. C) intraspecific competition. D) interspecific competition.
Gas hydrates represent a potential source of natural gas. Which of the following is the primary reason commercial production is not yet taking place?
A. produces many undesirable by-products B. unable to reach deposits on ocean floor C. thick, economical deposits have yet to be found D. price of natural gas is presently too high E. high potential for the uncontrolled release of gas