Tsunami arrive as a series of several waves separated by periods typically in the ________ range.
A. 1- to 6-hour
B. 1- to 6-second
C. 1- to 6-minute
D. 10- to 60-minute
E. 10- to 60-second
Answer: D
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Refuse-derived fuel differs from normal garbage in that it
A. Is sorted B. Has agricultural wastes C. Is selectively collected D. Has coal added E. Is unsorted
Which of the following is NOT a drawback of burning coal for electricity?
A. Much of the coal mined is through mountain top removal and valley fill, which leads to major environmental problems near the mine sites. B. When burned, coal gives off a high amount of sulfur compounds and mercury. C. Toxic coal ash much be stored indefinitely. D. Coal reserves in the U.S. are plentiful.
Which one of the following is consistent with deformation by folding?
a.) The crust is stretched and elongated. b.) Horizontal distance perpendicular to fold axes is lengthened. c.) The crust is thinned. d.) Horizontal distance is shortened perpendicular to fold axes.
Refraction causes headlands to be areas of ________ surfing and sites of ________
A) good; deposition B) good; erosion C) poor; deposition D) poor; erosion