|
|
 |
|
   |
|
|
|
|
|
- Students will review the concept of friction, learn about elastic rebound, and consider how a simple physical model relates to motion on a fault.
- The lab activity is intended to be done prior to covering the material in the slide set to encourage the students to draw from their personal experiences with friction and elasticity.
- This lab could be done in small groups or as a classroom demonstration, with students recording data. The lab begins with a few introductory questions written to encourage the students to think about friction and elasticity. The materials required and setup are described in the lab itself. Classrooms with access to a simple range finder can record data on a computer, but this lab can be modified to take measurements with a yardstick. (See alternative experimental setup instructions in the Example Results and Alternative Setup). Advance preparation is recommended for assembling the strips of sandpaper. In the data table, students can record either time in the first column if a range finder and computer is used, or position of the end of the rubberband if a yardstick is used, and position of the block in the second column. These values are then plotted on the supplied graph using the first column data for the x-axis and the second column data for the y-axis.
- This activity was developed for use in a high school (grades 9-12) earth science class. The goal of this lesson is for students to learn the concepts of elastic rebound and friction and how these apply to earthquakes and faults. Lesson duration: 90 minutes.
- Student learning may be assessed through review of their completed lab worksheets.
- Students may need assistance with making measurements and with plotting. Example data is included.
- In the review slides, elastic rebound is defined and the deformation in the near-field and far-field of a fault is illustrated. These slides discuss where and why aftershocks occur and include animations of aftershock sequences following two M 5 earthquakes in southern California.
|
|
|
|
|
|
|
|
 |
|
 |
|
|
|
|
|
ANZA Earthquake 2001
Plate Boundary
|
- Grade Level: 9-12
- Time Frame: 90 minutes
- California Science Standard 3d: "Plate tectonics operating over geologic time has changed the patterns of land, sea, and mountains on Earth’s surface. As the basis for understanding this concept: Students know why and how earthquakes occur and the scales used to measure their intensity and magnitude."
- California Science Standard 9b: "The geology of California underlies the state’s wealth of natural resources as well as its natural hazards. As a basis for understanding this concept: Students know the principal natural hazards in different California regions and the geologic basis of those hazards."
|
|
|
|
|
Design EarthRef.org
Sponsored by NSF and NSDL
|
|
|
|
|
|
|
|
