1. Ch 6 Review
Earthquakes

2. Question 1
The place where slippage first occurs is called an earthquake’s _______.
Focus
Epicenter
Magnitude
intensity

3. Question 1
The place where slippage first occurs is called an earthquake’s _______.
a) Focus

4. Question 2
The San Andreas Fault zone has formed where the edge of the Pacific plate is slipping
Under the North American Plate
Over the North American Plate
South along the North American Plate
North along the North American Plate

5. Question 2
The San Andreas Fault zone has formed where the edge of the Pacific plate is slipping
d) North along the North American Plate

6. Question 3
The Pacific Ring of Fire is an earthquake zone that forms a ring around
The Atlantic Ocean
South America
The Pacific Ocean
North America

7. Question 3
The Pacific Ring of Fire is an earthquake zone that forms a ring around
c) The Pacific Ocean

8. Question 4
When friction prevents the rocks on either side of a fault from moving past each other, the fault is said to be
fractured
subducting
locked
elastic

9. Question 4
When friction prevents the rocks on either side of a fault from moving past each other, the fault is said to be
c) locked

10. Question 5
Deep-focus earthquakes usually occur in areas in which one plate
Slides past another
Remains stationary against another
Moves apart from another
Subducts under another

11. Question 5
Deep-focus earthquakes usually occur in areas in which one plate
d) Subducts under another

12. Question 6 Ninety percent of continental earthquakes have
The same depth
A shallow focus
The same type of eruptions
A deep focus

13. Question 6 Ninety percent of continental earthquakes have
b) A shallow focus

14. Question 7
How far below the earth’s surface do intermediate-focus earthquakes occur?
10 to 30 km
30 to 70 km
70 to 300 km
300 to 650 km

15. Question 7
How far below the earth’s surface do intermediate-focus earthquakes occur?
c) 70 to 300 km

16. Question 8
Which type of earthquakes usually occurs farther inland than other earthquakes?
Deep-focus
Shallow-focus
Intermediate-focus
Microquakes

17. Question 8
Which type of earthquakes usually occurs farther inland than other earthquakes?
a) Deep-focus

18. Question 9 Most earthquakes occur along or near the edges of the
North American Plate
Earth’s oceans and lakes
Eurasian Plate
Earth’s lithospheric plates

19. Question 9 Most earthquakes occur along or near the edges of the
d) Earth’s lithospheric plates

20. Question 10
Where did the most widely felt series of earthquakes in the United States occur?
Alaska
California
Hawaii
Missouri

21. Question 10
Where did the most widely felt series of earthquakes in the United States occur?
d) Missouri

22. Question 11 Which type of seismic wave travels the fastest? Tsunami
P wave
S wave
Surface wave

23. Question 11
Which type of seismic wave travels the fastest?
b) P wave

24. Question 12 S waves can only travel through Gases Solids Liquids
Gases and liquids

25. Question 12
S waves can only travel through
b) Solids

26. Question 13
What is the minimum number of seismograph stations a scientist must have data from in order to locate the epicenter of an earthquake? 1 2 3 4

27. Question 13
What is the minimum number of seismograph stations a scientist must have data from in order to locate the epicenter of an earthquake?
c) 3

28. Question 14 A major earthquake has a magnitude of 2.5 to 3.5
Less than 2.5
7 or above

29. Question 14
A major earthquake has a magnitude of
d) 7 or above

30. Question 15 How many separate sensing devices make up a seismograph? 12 3 4

31. Question 15 How many separate sensing devices make up a seismograph?

32. Question 16
Which of the following generally causes the most damage during an earthquake?
Aftershock
Primary wave
Secondary wave
Surface wave

33. Question 16
Which of the following generally causes the most damage during an earthquake?
d) Surface wave

34. Question 17 Tsunamis result from earthquakes with epicenter located
On the ocean floor
In loose soil
Along coastlines
In continental faults

35. Question 17 Tsunamis result from earthquakes with epicenter located
a) On the ocean floor

36. Question 18 What is a tsunami? A deep-focused earthquake
A shallow-focus earthquake
A type of seismic wave
A giant ocean wave

37. Question 18
What is a tsunami?
d) A giant ocean wave

38. Question 19 Landslides on the seafloor are most likely to produce
Tsunamis
Fault zones
Seismic gaps
Elastic rebounds

39. Question 19 Landslides on the seafloor are most likely to produce
a) Tsunamis

40. Question 20 A seismic gap is a region in which
There are no seismographs
Tsunamis never occur
A fault is locked
Only deep-focus earthquakes occur

41. Question 20
A seismic gap is a region in which
c) A fault is locked

42. Question 21
During an earthquake, a person is most likely to be safe in
A car
An open field
A cellar
A building

43. Question 21
During an earthquake, a person is most likely to be safe in
b) An open field