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Chapter Overview

This chapter discusses stresses on rocks and mountain building, causes of earthquakes, seismic waves, measuring and predicting earthquakes, and earthquake safety.

Online Resources

See the following Web sites for appropriate laboratory activities:

In the quick, simple lab activity at the following URL, students will model the different types of stresses that act on rocks. Use the lab with the first lesson, “Stress in Earth’s Crust.” It is a good way to launch the chapter.

The lab at the URL below allows students to investigate tsunamis and the destruction they cause. They will compare tsunamis in oceans and fjords and learn why they behave differently.

This kinesthetic lab has students move as propagating seismic waves. They will compute wave velocities from their travel time along a string of measured length. Then they will simulate an earthquake and use the time lag between wave arrival times and their computed speeds to calculate the position of the epicenter.

These Web sites may also be helpful:

This URL has straightforward, clear animations of different types of faults: http://www.iris.edu/gifs/animations/faults.htm.

This resource provides a series of short articles on earthquake basics for students, teachers, and parents. The articles were originally published as weekly features in The San Francisco Chronicle.

You can link with several earthquake photo collections at these URLs:

The URL below has links to several short video lectures on earthquakes.

Numerous useful publications and other media relating to earthquakes can be accessed at this URL: http://www.exploratorium.edu/faultline/activezone/links.html

A series of seismology resources for teachers from the Seismological Society of America can be accessed at the following URL. The resources include reference information, maps, slide sets, videotapes, computer hardware and software, seismographs, and data sets.

Pacing the Lessons

Lesson Class Period(s) (60 min)
7.1 Stress in Earth’s Crust 2.5
7.2 Nature of Earthquakes 2.0
7.3 Measuring and Predicting Earthquakes 1.5
7.4 Staying Safe in Earthquakes 1.5

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