EARTH: AN INTRODUCTION TO PHYSICAL GEOLOGY

Chapter 11: Earthquakes

Concept #2 Quiz

Choose the best possible answer to the following questions about Key Concept 2 "Seismology and locating earthquakes."

epicenter_tasa_shad.jpg

1. The study of "earthquakes" (seismology) is to ____________. [Hint]

2. Which of the following is the difference between P and S waves? [Hint]

3.

Identify the type of seismic wave recorded on this typical seismogram by selecting the correct response. [Hint]

For each item below, use the pull-down menu to select the letter that labels the correct part of the image.

The letters A through C appear on an image associated with this question.

4. Which is correct regarding P and S seismic waves? [Hint]

5. Earthquake travel-time graph (Copyright © Tasa Graphic Arts, Inc.)

Using this earthquake travel-time graph, determine the approximate distance that this station is from the epicenter of an earthquake if the difference between first P and first S waves arrivals is 5 minutes. [Hint]

6. An important aspect of seismic waves is that they have different time gaps on seismograms from different locations. Why would a seismogram recorded closer to the epicenter have the P and S wave arrivals closer together than on a seismogram from farther away? [Hint]

7.

Match the term with the appropriate description:  

Using the pulldown boxes, match each item on the left to the corresponding item at right.

A. largest lateral wave, ground displacement only
B. slower, vertical motion, “shake” wave, causes temporary changes in rock shape
C. fastest, horizontal compression, “push-pull” wave, causes temporary changes in rock volume
D. moves in all directions
 

8. Why is it necessary to have data from at least 3 seismic stations in order to locate the epicenter of an earthquake? Choose all that apply. [Hint]

Some questions in this exercise may have more than one correct answer. And answer choices in this exercise are randomized and will appear in a different order each time the page is loaded.
 




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