Ch 6 Review

Earthquakes

Question 1 The place where slippage first occurs is

called an earthquake’s _______.a) Focusb) Epicenterc) Magnituded) intensity

Question 1 The place where slippage first occurs is

called an earthquake’s _______.a) Focus

Question 2 The San Andreas Fault zone has formed

where the edge of the Pacific plate is slipping

a) Under the North American Plateb) Over the North American Platec) South along the North American Plated) North along the North American Plate

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

Question 3 The Pacific Ring of Fire is an earthquake

zone that forms a ring arounda) The Atlantic Oceanb) South Americac) The Pacific Oceand) North America

Question 3 The Pacific Ring of Fire is an earthquake

zone that forms a ring around

c) The Pacific Ocean

Question 4 When friction prevents the rocks on

either side of a fault from moving past each other, the fault is said to be

a) fracturedb) subductingc) lockedd) elastic

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

Question 5 Deep-focus earthquakes usually occur in

areas in which one platea) Slides past anotherb) Remains stationary against anotherc) Moves apart from anotherd) Subducts under another

Question 5 Deep-focus earthquakes usually occur in

areas in which one plate

d) Subducts under another

Question 6 Ninety percent of continental

earthquakes havea) The same depthb) A shallow focusc) The same type of eruptionsd) A deep focus

Question 6 Ninety percent of continental

earthquakes have

b) A shallow focus

Question 7 How far below the earth’s surface do

intermediate-focus earthquakes occur?a) 10 to 30 kmb) 30 to 70 kmc) 70 to 300 kmd) 300 to 650 km

Question 7 How far below the earth’s surface do

intermediate-focus earthquakes occur?

c) 70 to 300 km

Question 8 Which type of earthquakes usually occurs

farther inland than other earthquakes?a) Deep-focusb) Shallow-focusc) Intermediate-focusd) Microquakes

Question 8 Which type of earthquakes usually occurs

farther inland than other earthquakes?a) Deep-focus

Question 9 Most earthquakes occur along or near the

edges of thea) North American Plateb) Earth’s oceans and lakesc) Eurasian Plated) Earth’s lithospheric plates

Question 9 Most earthquakes occur along or near the

edges of the

d) Earth’s lithospheric plates

Question 10 Where did the most widely felt series of

earthquakes in the United States occur?a) Alaskab) Californiac) Hawaiid) Missouri

Question 10 Where did the most widely felt series of

earthquakes in the United States occur?

d) Missouri

Question 11 Which type of seismic wave travels the

fastest?a) Tsunamib) P wavec) S waved) Surface wave

Question 11 Which type of seismic wave travels the

fastest?

b) P wave

Question 12 S waves can only travel througha) Gasesb) Solidsc) Liquidsd) Gases and liquids

Question 12 S waves can only travel through

b) Solids

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?

a) 1b) 2c) 3d) 4

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

Question 14 A major earthquake has a magnitude ofa) 2.5 to 3.5b) 3.5 to 6.0c) Less than 2.5d) 7 or above

Question 14 A major earthquake has a magnitude of

d) 7 or above

Question 15 How many separate sensing devices

make up a seismograph?a) 1b) 2c) 3d) 4

Question 15 How many separate sensing devices

make up a seismograph?

c) 3

Question 16 Which of the following generally causes

the most damage during an earthquake?a) Aftershockb) Primary wavec) Secondary waved) Surface wave

Question 16 Which of the following generally causes

the most damage during an earthquake?

d) Surface wave

Question 17 Tsunamis result from earthquakes with

epicenter locateda) On the ocean floorb) In loose soilc) Along coastlinesd) In continental faults

Question 17 Tsunamis result from earthquakes with

epicenter locateda) On the ocean floor

Question 18 What is a tsunami?a) A deep-focused earthquakeb) A shallow-focus earthquakec) A type of seismic waved) A giant ocean wave

Question 18 What is a tsunami?

d) A giant ocean wave

Question 19 Landslides on the seafloor are most likely

to producea) Tsunamisb) Fault zonesc) Seismic gapsd) Elastic rebounds

Question 19 Landslides on the seafloor are most likely

to producea) Tsunamis

Question 20 A seismic gap is a region in whicha) There are no seismographsb) Tsunamis never occurc) A fault is lockedd) Only deep-focus earthquakes occur

Question 20 A seismic gap is a region in which

c) A fault is locked

Question 21 During an earthquake, a person is most

likely to be safe ina) A carb) An open fieldc) A cellard) A building

Question 21 During an earthquake, a person is most

likely to be safe in

b) An open field