The Cascade Range in North America is predominately volcanic and plutonic in character
a. True
b. False
True
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Which of the following is a disadvantage of clear-cutting?
A. low timber yield B. cannot reforest with fast-growing trees C. destroys and fragments wildlife habitats D. low profits in the short-term E. increases surface fires
Which of the following are tectonic settings where large magma chambers can form?
A. in areas of continental collisions B. in the continental lithosphere within regions of hot spots and rifts C. above subduction zones D. in the oceanic lithosphere above hot spots and within mid-ocean ridges E. All of these choices are correct.
Which best describes the cost-benefit results of the first 20 years of the Clean Air?
A) Because many of the benefits of clean air are intangible, it is not possible to make such comparisons. B) While costs have exceed benefits 2 to 1, benefits are expected to increase in the coming decades. C) Costs have been far greater than the benefits. D) In 2010, alone, estimated benefits exceeded costs by 4 to 1.
Each player pulls with 400 N during a tug-of-war match. The tension in the rope is
A. 400 N. B. 800 N. C. 0 N. D. 600 N.