Question 1

A seismic wave will speed up when passing from the crust to the mantle because the mantle is made of ________.

Accepted Answer

A)  granite
B)  magma
C)  peridotite
D)  basalt

Question 2

Earth's gravity is best represented by an equipotential surface that contains bumps and depressions,where areas of higher or lower gravity appear over Earth.This representation is called the ________.

Accepted Answer

A)  reference geoid
B)  gravitational potential
C)  isostasy
D)  geoid

Question 3

You are studying the seismic data from Mars when you notice that there are no S-waves recorded from 130° through 180° on the opposite side of the planet.What does this information tell you about the interior of Mars?

Accepted Answer

A)  There is a layer of solid material in the interior of Mars.
B)  There is a layer of liquid material in the interior of Mars.
C)  There is a layer with a higher-velocity material than the crust below.
D)  There is a layer with a lower-velocity material than the crust below.

Question 4

Using the image below,explain why the P-wave velocity drops drastically at the core-mantle boundary.Also,explain why the P-wave velocity speeds up at the inner core-outer core boundary.

Accepted Answer

The P-wave velocity drops at the core-ma...

Question 5

If a gravity anomaly is negative,what does that imply about the material underground?

Accepted Answer

A)  The material is much more dense rock.
B)  The material is much less dense rock.
C)  The material is an underground ore.
D)  The material is composed of mantle.

Question 6

If a seismic wave is refracted upward at a boundary,what can be said about the material through which the wave is traveling?

Accepted Answer

A)  The wave is moving through two materials of the same velocity.
B)  The wave is moving from a faster material into a slower material.
C)  The wave is moving from a slower material into a faster material.
D)  The wave is traveling through a molten magma chamber.

Question 7

In the following graph,why does the line for S-waves NOT appear in the outer core?

Accepted Answer

A)  S-waves cannot travel through the outer core because it is solid.
B)  S-waves cannot travel through the outer core because it is liquid.
C)  S-waves disappear after being reflected at the core-mantle boundary.
D)  S-waves cannot travel that far into Earth due to the high amount of iron.

Question 8

Large portions of the state of Utah are composed of thick sequences of sedimentary rocks.Would the magnetic anomaly be positive or negative? Why?

Accepted Answer

The magnetic anomaly over a pa...

Question 9

Why are magnetic anomalies of continental crust so much more complicated than those of oceanic crust?

Accepted Answer

A)  The continents are much older and thus have had more time for the minerals to become magnetized.
B)  The continents contain abundant iron minerals,whereas the oceanic crust does not contain any iron minerals.
C)  The continents contain a random orientation of minerals that become magnetized when they interact with the magnetic field.
D)  The continents contain a complex distribution of igneous intrusions,lava flows,and iron-rich sediments.

Question 10

Earth's magnetic field is produced in the ________.

Accepted Answer

A)  crust
B)  mantle
C)  outer core
D)  inner core

Exam 23: Interlude D: The Earth S Interior Revisited: Insights From Geophysics

If a seismic wave is refracted upward at a boundary,what can be said about the material through which the wave is traveling?

Correct Answer
verified

Earth's gravity is best represented by an equipotential surface that contains bumps and depressions,where areas of higher or lower gravity appear over Earth.This representation is called the ________.

Correct Answer
verified

If a gravity anomaly is negative,what does that imply about the material underground?

Correct Answer
verified

In the following graph,why does the line for S-waves NOT appear in the outer core?

Correct Answer
verified

Earth's magnetic field is produced in the ________.

Correct Answer
verified

You are studying the seismic data from Mars when you notice that there are no S-waves recorded from 130° through 180° on the opposite side of the planet.What does this information tell you about the interior of Mars?

Correct Answer
verified

Why are magnetic anomalies of continental crust so much more complicated than those of oceanic crust?

Correct Answer
verified

A seismic wave will speed up when passing from the crust to the mantle because the mantle is made of ________.

Correct Answer
verified

Large portions of the state of Utah are composed of thick sequences of sedimentary rocks.Would the magnetic anomaly be positive or negative? Why?

Correct Answer
verified
The magnetic anomaly over a pa...
View Answer

Using the image below,explain why the P-wave velocity drops drastically at the core-mantle boundary.Also,explain why the P-wave velocity speeds up at the inner core-outer core boundary.

Correct Answer
verified
The P-wave velocity drops at the core-ma...
View Answer

Exam 23: Interlude D: The Earth S Interior Revisited: Insights From Geophysics

If a seismic wave is refracted upward at a boundary,what can be said about the material through which the wave is traveling?

Correct AnswerverifiedShow Answer

Earth's gravity is best represented by an equipotential surface that contains bumps and depressions,where areas of higher or lower gravity appear over Earth.This representation is called the ________.

Correct AnswerverifiedShow Answer

If a gravity anomaly is negative,what does that imply about the material underground?

Correct AnswerverifiedShow Answer

In the following graph,why does the line for S-waves NOT appear in the outer core?

Correct AnswerverifiedShow Answer

Earth's magnetic field is produced in the ________.

Correct AnswerverifiedShow Answer

You are studying the seismic data from Mars when you notice that there are no S-waves recorded from 130° through 180° on the opposite side of the planet.What does this information tell you about the interior of Mars?

Correct AnswerverifiedShow Answer

Why are magnetic anomalies of continental crust so much more complicated than those of oceanic crust?

Correct AnswerverifiedShow Answer

A seismic wave will speed up when passing from the crust to the mantle because the mantle is made of ________.

Correct AnswerverifiedShow Answer

Large portions of the state of Utah are composed of thick sequences of sedimentary rocks.Would the magnetic anomaly be positive or negative? Why?

Correct AnswerverifiedThe magnetic anomaly over a pa...View AnswerShow Answer

Using the image below,explain why the P-wave velocity drops drastically at the core-mantle boundary.Also,explain why the P-wave velocity speeds up at the inner core-outer core boundary.

Correct AnswerverifiedThe P-wave velocity drops at the core-ma...View AnswerShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The magnetic anomaly over a pa...
View Answer

Correct Answer
verified
The P-wave velocity drops at the core-ma...
View Answer