سوال ۱۸ کنکور ارشد مهندسی مکانیک ۱۴۰۰

PART C: Reading Comprehension

PASSAGE 1 (excerpt):

The earth's crust isn't one solid piece of rock, it's really pretty thin, like the shell of an egg is compared to the size of the egg. In fact, it's made up of huge plates of thin crust that "float" on the molten rock of the earth's mantle. While floating around on the mantle the edges of these plates slide past each other, bump into each other, and sometimes even crash. The oceanic crust is much heavier than the continental crust so when the plates crash into each other, the oceanic plate plunges downward toward the molten mantle, while the lighter, continental plate rides up over the top. The forces driving the two plates together are really intense so the underlying oceanic plate creates a trench where it drags the edge of the continental crust down as it descends underneath. This is what's happening on the bottom of the Pacific Ocean off the Marianas Islands. The really deep part of the ocean is in the bottom of the trench created by the subducting ocean crust.

All of the following about "subducting process" are true EXEPT ----------.