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____ 12. Which of the following are active faults? A. Tangbulan fault B. Tagoloan Fault C.Lianga Fault D. Central Mindanao Fault ____ 13. Using the map, what active fault is near Digos City? A. Mati fault B. Central Mindanao fault C. Lianga fault D. Daguma Extension ____ 14. Earthquake A has a Ritchter magnitude of 7 as compared with earthquake B which has magnitude 5. How many times is the magnitude of earthquake A stronger than earthquake B? A. 5 times B. 10 times C. 15 times D. 20 times ____ 15. A girl is sitting inside the house and felt an earthquake which and noticed hanging christmas lantern swing slightly. What Intensity scale did the girl felt? A. II B. IV C. VI D. IX ____ 16. Which of the following statements about seismic waves does not give information about the Earth’s interior? A. S waves disappear as they reach the core. B. At certain depths, waves are reflected and refracted. C. As seismic waves travel deeper into the crust, they speed up. D. Surface waves produce the most severe ground movements. ____ 17. Which will describe a surface wave? 1. known as L-waves 3. they have slow velocity and lower intensity 2. known as body waves 4. they can cause considerable ground movements A. 1 & 2 B. 1 & 3 C. 1, 3, 4 D. 2, 3, 4 ____ 18. How do rock particles move during the passage of a P-wave through the rock? A. Back and forth perpendicular to the direction of wave travel. B. In a rolling circular motion. C. Back and forth parallel to the direction of wave travel. D. The particles do not move. ____ 19. Which of the following best describes S-waves? A. Cause damage due to their great size. B. Travel through solid and liquids. C. Cause less damage due to their smaller size. D. Travel at faster speed. ____ 20. Which of the following sequences correctly lists the different arrivals of waves from first to last? A. P waves – Surface waves – S waves B. P waves – S waves – Surface waves C. Surface waves – P waves – S waves D. S waves – P waves – Surface waves
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