The Solid Earth - Chapter 5: What is an Earthquake?

Question 1

Earthquake is the _____ of earth produced by the rapid release of energy

Answer 1

Vibration

Question 2

The energy radiates in all directions from its source or ____

Answer 2

focus

Question 3

What form do the energy releases take?

Answer 3

Waves

Question 4

Large fractures in the earth that are associated with movements in earthquakes

Answer 4

Faults

Question 5

Describe the Plate Tectonics theory

Answer 5

Large slabs of the earth are continually in motion

Question 6

True or false: earthquakes are repetitive in that they are part of continuous motion

Answer 6

True

Question 7

Tectonic forces slowly deform the crustal rocks on both sides of the fault as illustrated by the ____ features

Answer 7

bent

Question 8

True of false: rocks can store energy as they are bending

Answer 8

True

Question 9

Eventually, the frictional resistance holding the rocks together is overcome. As slippage occurs at the ______, displacement will exert stress along the fault where more slippage will occur until most of the strain is released

Answer 9

weakest point (focus)

Question 10

Colloquial name for slippage allowing the rock to return to its original position

Answer 10

snap back

Question 11

The springing back of the rock was termed _____ by Reid since the rock behaves much like a rubber band

Answer 11

elastic rebound

Question 12

The adjustments that follow a major earthquake often generate these smaller earthquakes

Answer 12

aftershocks

Question 13

Small earthquakes that can precede a major earthquake

Answer 13

Foreshocks

Question 14

This is exhibited when faults exhibit a slow gradual displacement

Answer 14

creep

Question 15

The motion that takes place when segments remain locked and store elastic energy for hundreds of years before rupturing in a great earthquake

Answer 15

Stick slip

Question 16

True or false: movement along faults can be horizontal or vertical

Answer 16

True