SCIN 138 Week 3 Quiz

SCIN 138 Week 3 Quiz | Assignment Help | american-public-university-system

Week 3 Quiz

Question 1 of 20

The focus of an earthquake is a point

  A. on the Earth?s surface where the initial release of seismic energy occurs.

  B. on the Earth?s surface where seismic waves are reflected downward.

  C. within the Earth where seismic waves are reflected downward.

  D. within the Earth where the initial release of seismic energy occurs.(Right Answer)

Question 2 of 20

The epicenter of an earthquake is a point

  A. on the Earth's surface directly above the initial release of seismic energy.

  B. within the Earth directly beneath the initial release of seismic energy.

  C. on the Earth's surface where the initial release of seismic energy occurs.

  D. within the Earth where the initial release of seismic energy occurs.

Question 3 of 20

Which of the following seismic waves is the first to arrive at a seismic station?

  A. surface wave

  B. P wave

 C. S wave

  D. Love wave

Question 4 of 20

Which of the following seismic waves is the last to arrive at a seismic station?

  A. Love wave.

  B. P wave

  C. S wave

  D. Body wave

Question 5 of 20

Which seismic wave vibrates side-to-side relative to its direction of travel?

  A. all surface waves

  B. P waves

  C. S waves

  D. Rayleigh waves

Question 6 of 20

The two kinds of body waves are

  A. surface waves and P waves.

  B. Love waves and P waves.

  C. P waves and S waves.

  D. surface waves and S waves.

  E. Love waves and S waves.

Question 7 of 20

The following seismic waves are used to locate earthquake epicenters:

  A. surface waves and P waves.

  B. Rayleigh waves and P waves.

  C. P waves and S waves.

  D. surface waves and S waves.

  E. L waves and S waves.

Question 8 of 20

Look at the seismogram on page 320, in the horizontal east west direction (top of the graph), which of the following statements is correct?

  A. P-wave amplitude is larger the S-wave amplitude.

  B. S-wave amplitude is larger than P-wave amplitude.

  C. P-wave amplitude and S-wave amplitude are about the same.

  D. P-wave amplitude is larger than all the other seismic waves recorded on a seismogram.

Answer:-amplitude is the height above and below the x-axis and parallel to the y-axis

Question 9 of 20

Determining the distance along the Earth's surface from a seismic station to the epicenter of an earthquake is based on the difference in arrival times between <br/>

  A. the first P wave and the first S wave.

  B. the first P wave and the first Love wave.

  C. the first S wave and the first Love wave.

  D. all three seismic waves.

  E. none of the above.

Question 10 of 20

To locate the epicenter of an earthquake, it takes

  A. one seismic station.

  B. at least two seismic stations.

  C. at least three seismic stations.

  D. at least four seismic stations.

  E. no seismic stations.

Question 11 of 20

A magnitude 8 earthquake has _____ times the level of ground shaking as a magnitude 6, and releases ________ times more energy.

  A. 10, and 10

  B. 100, and 1000

  C. 1000, and 1000

  D. 10, and 100

Question 12 of 20

After what year does the number of magnitude 3 or greater earthquakes begin to rise significantly? (hint- what year is there a 10 fold increase from the previous years)

  A. 2007

  B. 2009.

  C. 2011

  D. 2015

Question 13 of 20

After what year does the number of fracking wells begin to rise significantly?

  A. 2007

  B. 2009

  C. 2011

  D. 2015

Question 14 of 20

Based on the graph that you constructed, do significant earthquakes and the number of fracking wells appear to be related?

  A. Yes.

  B. No

Question 15 of 20

How long was the rupture length (the length of the fault that was affected)? (Hint-zoom out, then select Tools in the top menu, then measuring. Use the “path” option to measure the length of the fault that shows the “Distribution of Slip” histogram.)

  A. 25 miles

  B. 74 miles

  C. l98miles

  D. 296 miles.

  E. 408 miles

Question 16 of 20

(Hint- to find the epicenter, open the “origin time and epicenter” link to Google Maps at the top of the page.) Locate the epicenter of the 1906 quake. Does the amount of horizontal slip decrease faster along the northern end or the southern end of the rupture? (In other words, where does the amount of horizontal slip NOT increase along the rupture? The northern or southern end of the fault, in relation to the epicenter?)

  A. northern end of the rupture

  B. southern end of the rupture.

Question 17 of 20

What was the shaking intensity like in Sacramento?

  A. light

  B. strong

  C. severe

  D. violent

  E. extreme

Question 18 of 20

What was the shaking intensity like in Sebastopol? (hint- to locate Sebastopol, type the name into the search box.)

  A. light

  B. strong

  C. severe

  D. violent

  E. extreme.

Question 19 of 20

Based on the map, would you be more likely to experience an earthquake of magnitude >6.7 by 2031 if living in the northwest Bay Area or southeast Bay Area?

  A. northwest.

 B. southeast

Question 20 of 20

Based on the liquefaction map, are areas more dangerous inland or along the coast?

  A. inland

  B. along the coast