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NEW CHAPTER
Earthquakes
CHAPTER
the BIG ideathe BIG idea
CHAPTER OUTLINE
Earthquakes release stress that has built up in rocks.
Earthquakes occur along faults.
Earthquakes release energy.
Earthquake damage can be reduced.
7.17.1
7.27.2
7.37.3
CHAPTER RESOURCES
VOCABULARY
KEY CONCEPT CHAPTER HOME
Earthquakes occur along faults.
SECTION OUTLINESECTION OUTLINE
stress
fault
Normal faults form as rocks are pulled apart.
earthquake
7.17.1
CHAPTERRESOURCESCHAPTERRESOURCES
VOCABULARY
KEY CONCEPT CHAPTER HOME
Earthquakes occur along faults.
SECTION OUTLINESECTION OUTLINE
stress
fault
Normal faults form as rocks are pulled apart. Reverse faults form as rocks are pushed together.
earthquake
7.17.1
CHAPTERRESOURCESCHAPTERRESOURCES
VOCABULARY
KEY CONCEPT CHAPTER HOME
Earthquakes occur along faults.
SECTION OUTLINESECTION OUTLINE
stress
fault
Normal faults form as rocks are pulled apart. Reverse faults form as rocks are pushed together. Strike-slip faults form as rocks are pushed horizontally in opposite directions.
earthquake
7.17.1
VISUALIZATION
Explore animations showing fault motion.
CLASSZONE.COM
CHAPTERRESOURCESCHAPTERRESOURCES
VOCABULARY
KEY CONCEPT CHAPTER HOME
seismic wave
Earthquakes release energy.
SECTIONOUTLINESECTIONOUTLINE
epicenter
seismograph
focus
Seismic waves move out from the focus in all directions.
7.27.2
VISUALIZATION
Explore primary-wave and secondary-wave motion.
CLASSZONE.COM CHAPTERRESOURCESCHAPTERRESOURCES
VOCABULARY
KEY CONCEPT CHAPTER HOME
Earthquake damage can be reduced.
SECTIONOUTLINESECTIONOUTLINE
aftershock
liquefaction
A powerful earthquake releases more energy and causes more shaking of the ground than does a weak earthquake.
tsunami
7.37.3
CHAPTERRESOURCESCHAPTERRESOURCES
VOCABULARY
KEY CONCEPT CHAPTER HOME
Earthquake damage can be reduced.
SECTIONOUTLINESECTIONOUTLINE
aftershock
liquefaction
An area’s risk of earthquakes can be predicted.
0 200 400 kilometers
0 200 400 miles
tsunami
7.37.3
CHAPTERRESOURCESCHAPTERRESOURCES
VOCABULARY
KEY CONCEPT CHAPTER HOME
Earthquake damage can be reduced.
SECTIONOUTLINESECTIONOUTLINE
aftershock
liquefaction
tsunami
Structures can be designed for greater safety in an earthquake.
7.37.3
CHAPTERRESOURCESCHAPTERRESOURCES
VOCABULARY
KEY CONCEPT CHAPTER HOME
I. Earthquakes occur along faults.
A. Rocks move along faults.
1. Normal Faults
KEY CONCEPTSUMMARYKEY CONCEPTSUMMARY
Earthquakes occur along faults.
B. Faults are classified by how rocks move.
2. Reverse Faults
3. Strike-Slip Faults
stress
fault
earthquake
7.17.1
CHAPTERRESOURCESCHAPTERRESOURCES
VOCABULARY
KEY CONCEPT CHAPTER HOME
KEY CONCEPTSUMMARYKEY CONCEPTSUMMARY
Earthquakes release energy.
II. Earthquakes release energy.
A. Energy from earthquakes travels through
Earth.
1. Waves and Energy
2. Primary Waves
3. Secondary Waves
4. Surface Waves
B. Seismic waves can be measured.
1. Using Seismographs
2. Locating an Earthquake
seismic wave
epicenter
seismograph
focus
7.27.2
CHAPTERRESOURCESCHAPTERRESOURCES
VOCABULARY
KEY CONCEPT CHAPTER HOME
III. Earthquake damage can be reduced.
A. Earthquakes can cause severe damage and
loss of life.
3. Damage from Tsunamis
B. Scientists work to monitor and predict
earthquakes.
1. Earthquake Magnitude
KEY CONCEPTSUMMARYKEY CONCEPTSUMMARY
Earthquake damage can be reduced.
2. Damage from Earthquakes
aftershock
liquefaction
tsunami
C. Structures can be designed to resist
earthquake damage.
7.37.3
CHAPTERRESOURCESCHAPTERRESOURCES
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