The velocities of P- and S-waves are determined by these two properties of the material they are
passing through: ____________________ and ____________________. Fill in the blank(s) with the appropriate word(s).
density, elasticity
elasticity, density
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Increased seismicity in some areas (e.g., Colorado, New Mexico, and Oklahoma) has been linked to
A) a continental plate—continental plate subduction zone. B) a rift valley hot spot in the mid-continental region. C) a strike-slip fault. D) orogeny E) wells associated with oil and gas drilling.
Which numbered feature on this figure is a scarp?
A) 1, a linear or curved scar marking where the slide pulled away from the hill
B) 2, small fractures within the sliding block
C) 3, the intact layers below the rock slide
D) 4, the front of the slide, where it overruns the land surface
E) 5, a valley or other open space in front of the slide
What type of environmental tool was adopted by the U.S. government in 1990, in order to reduce emissions of coal burning electricity-generating plants?
A. shrinkable marketable permits B. free marketable permits C. command-and-control permits D. both a and b above
Recycling which of the following produces an energy savings of 96% versus processing it from
metallic ore? a. Aluminum b. Steel c. Copper d. Glass e. Plastic