Problem 8
Explain how earthquakes occur. Include a description of how energy builds up in rocks and is later released.
Problem 9
From which of the following do primary and secondary waves move outward? A) epicenter C) Moho B) focus D) tsunami
Problem 10
What kind of earthquake waves stretch and compress rocks? A) surface C) secondary B) primary D) shear
Problem 11
What are the slowest seismic waves? A) surface C) secondary B) primary D) pressure
Problem 12
What is the fewest number of seismograph stations that are needed to locate the epicenter of an earthquake? A) two C) four B) three D) five
Problem 12
Explain why most earthquakes occur along plate boundaries.
Problem 13
An earthquake that occurred in San Fernando, California, in 1971 caused \$500 million in damage. An earthquake that occurred in Whittier, California, in 1987 caused \$358 million in damage. How much more damage was caused by the San Fernando earthquake?
Problem 13
What happens to primary waves when they pass from liquids into solids? A) slow down C) stay the same B) speed up D) stop
Problem 14
What part of a seismograph does not move during an earthquake? A) sheet of paper C) drum B) fixed frame D) pendulum
Problem 14
What factors affect damage done by an earthquake?
