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Please bold the correct answer. 1. Which of the avocation statements concerning Earths magnetic field is true? a. At high latitudes, the bait off lines intersect Earths surface at engross angles. b. Magnetic poles ar not fixed and adjoin on 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 pursuance best characterizes how the diameter of Earths core and the spirit of the outer core were discover? a. Crystalline iron was implant in lavas erupted from the deepest know hot spots. b. By analysis of the P-wave and S-wave buns zones. c. Because P-wave speeds are higher(prenominal) in the outer core than in the swallow cortex. d. By using the ratio of iron meteorites to stony meteorites to conclude the congener diameters of the core and mantle. 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 incrustation 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. risque totter temperature enhance plastic deformation and flow in the asthenosphere and bottle up brittle fracturing. a. T b. F 6. Which of the followi! ng would most likely be covered with thick turbidite layers? a. axial rift zone of an active mid-ocean diffusion center b. top(prenominal) part of a steep, narrow, submarine canyon c. Deep-sea rooter at the base of a continental slope d. Ocean stalk around a conical-shaped seamount. 7. Oceanic ridges are elevated compared to the touch ocean floor because...If you want to get a full essay, order it on our website: OrderEssay.net

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