The Mohorovicic discontinuity occurs because of a
A) change in temperature with depth.
B) shift in the density of minerals with the same composition.
C) change in the composition of rocks on both sides of the boundary.
D) density change in rocks of the same composition on both sides of the boundary.
Correct Answer:
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Q19: In comparison to S-waves,P-waves
A)vibrate the particles of
Q20: Motion in a P-wave is
A)side to side.
B)transverse.
C)longitudinal.
D)up
Q21: The outer core
A)has a plastic-like flow.
B)flows fast
Q22: The Mohorovicic discontinuity marks the change in
Q23: The asthenosphere is part of the
A)crust.
B)lithosphere.
C)mantle.
D)outer core.
Q25: Earth's magnetic field is not stable; throughout
Q26: The Mohorovicic discontinuity was discovered by observing
A)earthquake
Q27: The thickness of Earth's crust
A)varies from 10
Q28: Because S-waves do not travel through Earth's
Q29: The outer core is
A)rock.
B)plastic.
C)liquid.
D)the source for volcanoes.
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