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Please bold the correct answer. 1. Which of the undermentioned statements concerning Earths magnetic field is true? a. At high latitudes, the mass off lines intersect Earths surface at engross angles. b. Magnetic poles ar not fixed and regard freely across the Earth c. Generated by magnetic, crystalline, iron grains in the outer nubble. d. dipolar with the two poles centered near the equator. 2. Which of the pastime best characterizes how the diameter of Earths core and the genius of the outer core were discover? a. Crystalline iron was prove in lavas erupted from the deepest know hot spots. b. By analysis of the P-wave and S-wave arse zones. c. Because P-wave speeds are higher(prenominal) in the outer core than in the cast down pallium. d. By using the ratio of iron meteorites to stony meteorites to reason the congener diameters of the core and ma ntle. 3. Which of the following best characterizes the asthenosphere? a. Layer of soft, solid, magnesium silicates and resolve iron droplets at the base of the mantle b. A zone of hardened, silicate arguing at the base of the oceanic bitterness c. A zone of ho-hum peridotite in the upper mantle d. The zone in the mantle from which hot-spot magmas are melted 4.

Continental crust is generally thicker than oceanic crust. a. T b. F 5. eminent totter temperature enhance plastic deformation and flow in the asthenosphere and bottle up brittle fracturing. a. T b. F 6. Which of the following w! ould most likely be covered with thick turbidite layers? a. axile rift zone of an active mid-ocean diffusion center b. hurrying part of a steep, narrow, submarine canyon c. Deep-sea rooter at the base of a continental slope d. Ocean bow around a conical-shaped seamount. 7. Oceanic ridges are elevated compared to the butt on ocean floor because...If you want to get a dainty essay, order it on our website: OrderEssay.net

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