QUESTION 4 Part II. Introduction to Earthquakes. Question 1. What happens to rocks during an earthquake? A. In a fault

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QUESTION 4
Part II. Introduction to Earthquakes. Question 1. What happensto rocks during an earthquake?
A. In a fault zone, as the strain in the rocks graduallybuilds up over time, the rock blocks are bent on either side of thefault and undergo elastic deformation.
B. Tectonic forces overcome the shear strength of therock. The rock breaks, or undergoes brittle deformation, alongthe fault plane and can slip.
C. Energy is released when the rocks break or undergobrittle deformation. The release of strain causes therock to unbend or undergo elastic rebound.
D. The generation of seismic waves and ground shaking.
Part II. Introduction to Earthquakes. Question 2. At what pointis energy released?
A. In a fault zone, as the strain in the rocks graduallybuilds up over time, the rock blocks are bent on either side of thefault and undergo elastic deformation.
B. Tectonic forces overcome the shear strength of therock. The rock breaks, or undergoes brittle deformation, alongthe fault plane and can slip.
C. Energy is released when the rocks break or undergobrittle deformation. The release of strain causes therock to unbend or undergo elastic rebound.
D. The generation of seismic waves and ground shaking.
Part II. Introduction to Earthquakes. Question 3. What is theeffect of the energy release?
A. In a fault zone, as the strain in the rocks graduallybuilds up over time, the rock blocks are bent on either side of thefault and undergo elastic deformation.
B. Tectonic forces overcome the shear strength of therock. The rock breaks, or undergoes brittle deformation, alongthe fault plane and can slip.
C. Energy is released when the rocks break or undergobrittle deformation. The release of strain causes therock to unbend or undergo elastic rebound.
D. The generation of seismic waves and ground shaking.
Part III. Introduction to Seismic Waves. Question 1. What threetypes of waves are generated during an earthquake?
A. Primary or P-waves
B. Secondary or S-waves
C. Surface waves
D. All of the above
Part IV: Analyzing Seismic Data. Question 1. Which seismogramshows the greatest amplitude (wave height)?
Eureka, California
Elko, Nevada
Las Vegas, Nevada
Part IV: Analyzing Seismic Data. Question 2. Based on theamplitude, which seismograph station is probably closest to theearthquake epicenter?
Eureka, California
Elko, Nevada
Las Vegas, Nevada
Part IV: Analyzing Seismic Data. Question 3. Is there a knownfault near the epicenter that is likely to have slipped to createthe earthquake? If so, name the fault.
A. New Madrid Fault
B. San Bernadino Fault
C. San Andreas Fault
Part VI. Earthquake Probability. Question 6. What areas in thecontinental U.S. have the greatest earthquake hazard? How did youdetermine which regions to include?
A. West coast of the USA on the San Andreas Fault
B. Central USA near New Madrid Fault Zone
C. South Carolina
D. The regions outlined above in A, B, C have a 2% probability of experiencing the highest peak groundacceleration (PGA) from an earthquake within the next 50 years.
Part VII. Earthquakes Today: Seismic Monitor. Question 1. Abouthow many red circles, indicating earthquakes that happened today,are there?
A. Less than 5
B. Between 5 and 20
C. Between 21 and 100
D. More than 100
Part VIII. Questions. Question 5. Earthquake magnitude is ameasure of

A. the amplitude of seismic waves.

B. the arrival time of primary waves.

C. people’s reactions during an earthquake.

D. rupture spot