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Fig. 2, I move my plate B in the direction marked by the arrow. Now imagine that

ID: 234475 • Letter: F

Question

Fig. 2, I move my plate B in the direction marked by the arrow. Now imagine that these two plates are lithosphere, and that B is the more dense, while A is the less dense. Recall what you studied in the previous lessons (especially Lesson 2). If plate B moves relatively to plate A (i.e. the two plates are diverging), a “crack” must form along the ab side of the triangle, revealing “something” that lays beneath the lithosphere. Along the sides ac and bc of the triangle, the two plates are converging.

Now using Fig. 3 (below), What is forming along the ac and bc sides of plate B?

A. a trench; B. a subduction zone; C. a transform boundary; D. a ridge;
2 1

Explanation / Answer

C. a transform boundary, since relative sliding occurs

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