Chapter 21

Name the four major regions of the Earth, from "outermost" to "innermost."

What is the Moho?

What is meant by the term Pangaea?

What is remanent magnetism?

Briefly state three types of evidence that support the concept of continental drift.

What is the Mid-Atlantic Ridge?

What, in the context of plate tectonics, is a plate?

Give a brief explanation of the concept of isostasy.

Describe the three general types of plate boundaries.

What is a subduction zone?

At what type of plate boundary is rock consumed? Produced? Neither consumed nor produced?

When an oceanic plate collides with a continental plate at a convergent boundary, which one is subducted? Why?

Briefly, how are volcanoes explained in the theory of plate tectonics?

In what general regions on Earth are volcanoes found?

Give three examples of mountains formed by volcanic activity.

Briefly, how are earthquakes explained in the theory of plate tectonics?

Name the two plates that border the San Andreas Fault. How are the plates moving relative to one another?

Distinguish between the focus and the epicenter of an earthquake.

Which type of seismic body wave cannot travel though a liquid medium?

What is measured by the Richter scale? What is measured by the Mercalli scale?

Distinguish among a normal fault, a reverse fault, and a transform fault.

Name the type of plate boundary that is most likely to cause mountain building.