EARTH: AN INTRODUCTION TO PHYSICAL GEOLOGY

Chapter 11: Earthquakes

Concept #1 Quiz

Choose the best possible answer to the following questions about Key Concept 1 "Earthquake basics."

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1. An earthquake’s source of energy is located at the _____________, but the location at the land surface above that point is called the ______________. [Hint]

2.

Identify the indicated earthquake components by selecting the correct response.  

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 D appear on an image associated with this question.

 [Hint]
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3. The “focus” and “epicenter” associated with earthquakes are _________ and _________, respectively. [Hint]

4.

Match the following basic earthquake terms with the appropriate description:  

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

A. slow and gradual displacement along a fault, usually resulting in little earthquake activity
B. the location on the surface of the earth, below which the point of rupture occurred
C. a tremor or smaller earthquake that precedes a main larger earthquake
D. a tremor or smaller earthquake that precedes a main larger earthquake
E. a “snap back” action – the cause of earthquakes
F. large fractures in the Earth along which rocks are moved and/or displaced, causing earthquakes
G. the source point from which all earthquake energy radiates
 

5. How is a “fault,” a “focus,” and an “epicenter” related to an earthquake? [Hint]

6. Which of the following best describes “elastic rebound” theory of earthquakes? [Hint]

7. Why do “main” earthquakes have “foreshocks” and “aftershocks”? [Hint]

8. Which of the following would NOT be a situation that would produce an earthquake?  

9. Which of the following theories is now widely accepted as the most likely mechanism for earthquakes, and why? [Hint]

10. Why are most of the Earth’s earthquakes’ foci located fairly close to the surface, and not farther down? [Hint]

Answer choices in this exercise are randomized and will appear in a different order each time the page is loaded.
 




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