Exam 23: The Earth’s Interior Revisited: Insights from Geophysics

The Earth's magnetic field is produced in the ________.

What behavior will seismic waves exhibit when traveling from a lower-velocity material into a high-velocity material?

The subdiscipline of geology that investigates the Earth's physical characteristics such seismic waves,gravity,and magnetism is termed _______.

If a P-wave is traveling through the Earth and encounters a molten magma chamber,what will happen to the velocity of the P-wave?

If you measure the magnetization of an area of igneous rocks and find a large negative anomaly,what does that imply about the rocks?

During the last ice age,continental glaciers covered significant portions of the North American continent.In the context of Archimedes' principle,what effect would these glaciers have had on the lithosphere relative to the asthenosphere? How was isostatic equilibrium achieved?

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

The core consists of two layers: a(n)________ inner core and a(n)________ outer core.

If an S-wave is traveling through rock when it encounters a molten magma chamber,what will happen to the velocity of the S-wave?

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