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

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

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

Earth's magnetic field is produced in the ________.

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?

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

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

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

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.

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 ________.

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