D) Where magma bodies arc Answer: A 21) The A) Schrodi emplaced docp in the crus
ID: 113005 • Letter: D
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D) Where magma bodies arc Answer: A 21) The A) Schrodi emplaced docp in the crust a seismic in seismic wave velocity. boundary between the crust and the mantle where there is a boundary 22) Which layer of Earth makes up more than 82 percent of the A) Outer core B) Crust C) Mantle D) Inner core 23) Which layer or layers of the inscrior A) Mantle B) Mantle and outer core are believed to have convection cells? 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) Subterrancan streams C) Seawater seeping into the interior at mid-occan rifts D) Subducting oceanic lithosphere 25) The composition ofthe upper mantle is defined by A) granite B) quartz C) perovskite 26) Which layer is thought to be the birthplace of deep mantle plumes? A) Transition zone B) Outer core D) peridotite 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 Pricional dreg push tifent rate than the rest of the planet. 17 Copyright © 201 7 Pearson Education, Inc.Explanation / Answer
1. Moho boundary is the seismic boundary lies between crust and mantle.
2. Mantle occupies more than 82 percent of earth volume.
3.Mantle are belived to having convection cells because of flow of hot magma in mantle.
4.Subducting oceanic lithosphere
5.Peridotite because upper mantle ha olivine and a compound with silicon dioxide.
6.D layer is the area where deep mantle plumes originate
7.The inner core is seperated from the mantle by liquid oter core and can spin freely
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