I.Directions: Encircle the letter of the correct answer. 1. What layer of the Earth is made up of tectonic plates? a. crust b. inner core c. outer core 2. This refers to the amount of energy released by the earthquake from its origin? a. focus b. epicenter c. intensity 3. Describe the Pacific Ring of Fire. a. An area where crustal plates are hard. b. An area where crustal plates are weak. d. An area without earthquakes. c. An area without crustal plates. 4. At what magnitude can an earthquake cause displacement of buildings and cracks on the earth's surface? a. Magnitude 4 5. Where is an epicenter located? b. Magnitude 5 c. Magnitude 6 d. Magnitude 7 a. directly above the focus c. directly above the magnitude d. directly below the magnitude b. directly below the focus 6. Which of the following events causes an earthquake? a. too much heat from the sun b. changing temperatures c. movement of crustal plates d. mixture of crustal plates 7. Where does an earthquake originate? a. epicenter b. focus c. intensity 8. What does PHILVOLCS mean? a. Philippine Institute of Volcanology c. Philippine Institute of Volcanology and Seismology Seismologists 9. Which of the following refers to the ground above the focus? b. focus a. epicenter c. seismology 10. What is the scale used by PHILVOLCS to measure the intensity of the earthquake? a. Reichter Magnitude Scale c. Philippine Earthquake Intensity Scale (PEIS) d. mantle d. magnitude d. magnitude b. Philippine Institute of Volcanologists d. Philippine Institute of Volcanologists and d. volcanology b. Richter Magnitude Scale d. PHILVOLCS Earthquake Intensity Scale
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