Dynamic Crust 2: Question Preview (ID: 10142)

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a) F b) E c) C d) A
Compared to the continental crust, the oceanic crust is
a) thinner b) composed of a less dense type of rock c) the same thickness d) thicker
liquid layer
a) P-waves, but no S-waves b) no seismic waves c) S-waves, but no P-waves d) both P- and S-waves
a) B b) D c) C d) A
When a major earthquake occurs, there is a region of Earth's surface where no direct P- and S-waves can be detected. This is known as the shadow zone. What causes this shadow zon
a) Seismic waves are refracted within Earth b) Seismic was are reflected within Earth. c) P-waves are blocked by liquid. d) S-waves are blocked by liquid.
Theories about Earth's core are supported by meteorites composed of
a) iron and nickel b) aluminum and iron c) aluminum and oxygen d) oxygen and silicon
Which of the following lists the layers of Earth in order of increasing density?
a) crust, mantle, outer core, inner core b) crust, mantle, inner core, outer core c) inner core, outer core, mantle, crust d) inner core, outer core, crust, mantle
Most inferences about the states of matter of Earth's mantle and core are based on
a) the behavior of seismic waves in Earth's interior b) rocks brought back from Earth's moon c) chemical changes in weathered metamorphic outcrops d) deep wells that extend into the mantle and core
S-waves from an earthquake that travel down toward Earth's center will
a) be absorbed by Earth's liquid outer core b) reach the far side of Earth faster than P-waves c) be totally reflected off the crust-mantle interface d) be refracted (deflected) by Earth's magnetic field
These are formed when tectonic plates move away from each other.
a) ocean ridges b) plateaus c) valleys d) trenches
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