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Ch 21: Earthquakes

About This Chapter

Watch online video lessons and learn what earthquakes are, what their impact can be, and how they are studied. These engaging lessons are just a portion of our online study guide and video collection. Each lesson is accompanied by a short quiz to challenge and help assess what you have learned.

Earthquakes - Chapter Summary and Learning Objectives

Earthquakes are the often catastrophic results of the rapid release of elastic energy stored in rocks. In this chapter, our knowledgeable instructors explain the causes of earthquakes and the terms used to describe their various aspects. You will learn about the damage earthquakes can cause and examine the technologies scientists use to study them. By the time you've finished the videos in this chapter, you will be familiar with:

  • The definition, causes, and history of earthquakes
  • Aftershocks and foreshocks
  • Scientific methods of studying and measuring earthquakes
  • Destruction caused by earthquakes
  • The source of earthquakes

Video Objective
What is an Earthquake? - Definition and History Describe the nature of earthquakes and define faults, foci, and epicenter.
The Causes of Earthquakes Learn how the rapid release of energy stored in rocks causes earthquakes and explain elastic rebound.
Aftershocks and Foreshocks of an Earthquake Examine the difference between aftershocks and foreshocks.
Using Seismic Waves Describe how seismic waves are used to study earthquakes.
Using the Richter Scale Explore how scientists use Richter Scale as a method of measuring earthquakes.
Destruction Caused by Earthquakes Study the nature of the damage caused by earthquakes.
Identifying the Source Research how the source of an earthquake is identified.

6 Lessons in Chapter 21: Earthquakes
Test your knowledge with a 30-question chapter practice test
What is an Earthquake? - Definition and Components

1. What is an Earthquake? - Definition and Components

Earthquakes are well known for the damage and destruction they leave behind. But what is an earthquake? In this video lesson you will learn about what causes earthquakes and the various components involved in these powerful natural disasters.

The Causes of Earthquakes

2. The Causes of Earthquakes

In this video lesson you will learn what causes earthquakes and where they occur. You will also understand the theory of elastic rebound, and how this relates to movement of the earth's crust.

Identifying and Understanding Earthquakes Using Seismic Activity

3. Identifying and Understanding Earthquakes Using Seismic Activity

Scientists can learn a lot about earthquakes by studying how they move ground. Using seismic activity, we can learn where an earthquake originated as well as how strong it was. In this video lesson, you will learn about seismic activity and how it relates to our understanding of earthquakes.

Aftershocks & Foreshocks of an Earthquake

4. Aftershocks & Foreshocks of an Earthquake

An earthquake is not an isolated event of ground shaking. Foreshocks and aftershocks occur with most earthquakes, and in this video lesson you will learn about them and how they are part of the overall process.

Using the Richter Scale to Measure Earthquakes

5. Using the Richter Scale to Measure Earthquakes

In this video lesson, you will learn about earthquake magnitude and how it is measured. You will also learn how that relates to the amount of energy released during an earthquake, as well as how common different magnitude earthquakes are around the world.

Destruction Caused by Earthquakes

6. Destruction Caused by Earthquakes

Earthquakes are well-known for their damage and destruction, and in this video lesson you will learn about the different types of damage that these dangerous natural disasters can cause.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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