D) Where magma bodies are emplaced deep in the crust Answer: A 21) The dramatic
ID: 113004 • Letter: D
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D) Where magma bodies are emplaced deep in the crust Answer: A 21) The dramatic increase in seismic wave velocity A) B) Greenschist facies C) Low-velocity pathway D) Moho boundary is a seismic boundary between the crust and the mantle where there is a 22) Which layer of Earth makes up more than 82 percent of the volume of the planet? A) Outer core B) Crust C) Mantle D) Inner core 23) Which layer or layers of the interior are believed to have convection cells? A) Mantle B) Mantle and outer core C) Inner core D) Outer core and inner core 24) How does water get from the surface to the middle of the mantle? A) Percolation via pores and fractures B) Subterranean streams C) Seawater seeping into the interior at mid-occan rifts D) Subducting oceanic lithosphere 25) The composition of the upper mantle is defined by A) granite B) quartz C) perovskite D) peridotite 26) Which layer is thought to be the birthplace of deep mantle plumes? A) Transition zone B) Outer core C) D" layer D) Shadow zone 27) The inner core is believed to rotate independently from the outer layers of Earth. Why is this possible? A) The immense interior pressures generate rotation. B) The inner core is separated from the mantle by the liquid outer core and can spin freely C) Radioactive decay generates spin. D) Frictional drag pushes the inner core at a different rate than the rest of the planet. 17 Copyright © 2017 Pearson Education Inc.Explanation / Answer
21) D) Moho Boundary
22) C) mantle
23) B) Mantle and outer core
24) D) Subduction Oceanic Lithosphere.
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