Earths Interior And Crustal Composition Question Preview (ID: 56788)

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Compared to the continental crust, the oceanic crust is

a) thicker

b) more dense

c) more granitic

d) more granitic

The most abundant element in the Earth's crust is

a) nitrogen

b) oxygen

c) silicon

d) hydrogen

Compared to the oceanic crust, the continental crust is usually

a) thicker, with a less dense granitic composition

b) thicker, with a more dense basaltic composition

c) thinner, with a less dense granitic composition

d) thinner, with a more dense basaltic composition

The observed difference in density between continental crust and oceanic crust is most likely due to differences in their

a) composition

b) thickness

c) porosity

d) rate of cooling

Which element is most abundant by mass in the Earth's crust?

a) nitrogen

b) oxygen

c) silicon

d) iron

Oxygen is the most abundant element by volume in the Earth's

a) inner core

b) troposphere

c) hydrosphere

d) crust

No P-waves or S-waves are received in the shadow zone because

a) P-waves are absorbed and S-waves are refracted by Earth's outer core

b) P-waves are refracted and S-waves are absorbed by Earth's outer core

c) both the P-waves and S-waves are refracted by Earth's outer core

d) both the P-waves and S-waves are absorbed by Earth's outer core

The analysis of seismic data from an earthquake shows that some locations received both P-waves and S-waves, but other locations received only P-waves. What is the best inference that can be made from these observations?

a) A zone of liquid rock exists within the Earth.

b) Iron in some rocks prevents S-waves from traveling.

c) Some seismographs are more sensitive than others.

d) S-waves are very weak.

A geologist who compares nonsedimentary rock samples from locations A and B would probably find that the samples from location A contain

a) more granite

b) more basalt

c) more fossils

d) the same minerals and fossils

The Moho is a boundary located in zone

a) A

b) B

c) D

d) E

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