PHSC 211 Chapter 8 Quiz (Fall 2020)– Liberty University (A grade) | Elements of Earth Science

PHSC 211 Chapter 8 Quiz (Fall 2020)– Liberty University (A grade) Questions 1 through 4 are based on Lab Exercise #1: Time Lag. 1. Record your answer from Lab Exercise #1, Step 1, Question 1. What time in hours:minutes:seconds GMT did the P waves arrive? a. 01:48:00 b. 01:49:00 c. 01:50:00 d. 01:51:00 2. Record your answer from Lab Exercise #1, Step 1, Question 2. What time in hours:minutes:seconds GMT did the S waves arrive? a. 01:51:30 b. 01:52:00 c. 01:53:10 d. 01:54:20 3. Record your answer from Lab Exercise #1, Step 1, Question 3. What is the time lag (S-P) in hours:minutes:seconds? a. 00:02:00 b. 00:03:20 c. 00:03:30 d. 00:04:10 4. Record your answer from Lab Exercise #1, Step 2, Question 4. What is the distance in kilometers between the seismic station and the epicenter? a. 2400 km b. 2600 km c. 2800 km d. 3000 km Questions 5 through 11 are based on Lab Exercise #2: Locating the Epicenter of an Earthquake. 5. Record your answer from Lab Exercise #2, Step 1. What is the time lag for noted at the Seattle, Washington, seismic station? a. 45 seconds b. 50 seconds c. 55 seconds d. 65 seconds 6. Record your answer from Lab Exercise #2, Step 2. What is the distance between the Seattle seismic station and the earthquake’s epicenter? a. 600 km b. 700 km c. 800 km d. 900 km 7. Record your answer from Lab Exercise #2, Step 3. What is the time lag for noted at the Los Angeles, California, seismic station? a. 100 seconds b. 120 seconds c. 140 seconds d. 160 seconds 8. Record your answer from Lab Exercise #2, Step 4. What is the distance between the Los Angeles seismic station and the earthquake’s epicenter? a. 1000 km b. 1100 km c. 1300 km d. 1500 km 9. Record your answer from Lab Exercise #2, Step 5. What is the time lag for noted at the Austin, Texas, seismic station? a. 120 seconds b. 140 seconds c. 165 seconds d. 180 seconds 10. Record your answer from Lab Exercise #2, Step 6. What is the distance between the Austin seismic station and the earthquake’s epicenter? a. 1950 km b. 2200 km c. 2550 km d. 2850 km 11. Record your answer from Lab Exercise #2, Step 12. What city is nearest to the epicenter? a. Helena b. Bismark c. Boise d. Cheyenne 12. 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. 13. 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. 14. Which of the following seismic waves has the same wave form as a sound wave? a. surface wave b. P wave c. S wave d. Love wave 15. 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 16. 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 17. Which seismic wave vibrates side-to-side relative to its direction of travel? a. surface wave b. P wave c. S wave d. Rayleigh wave 18. 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. Love waves and S waves. 19. 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. 20. 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. 21. 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 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. 22. 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. 23. Name and describe two differences between P-waves and S-waves. A P-wave, also known as a pressure or primary wave, is the first wave to arrive and moves the same way that a sound wave does. S-waves, also know as shear or secondary waves, travel slower than P-waves and move in a side to side direction of the wave.