I. Read each item carefully and encircle the letter of the correct answer.
 
1. What layer of the the Earth is made up of tectonic plates?
             A. crust              B. inner core                 C. outer core                D. mantle
 
2. This refers to the amount of energy released by the earthquake from its origin.
             A. focus                          B. epicenter                       C. intensity                    D. magnitude
 
3. What is the Pacific Ring of Fire?
             A. an area where crustal plates are hard
             B. an area where crustal plates are weak
             C. an area without crustal plates
             D. an area without earthquakes
 
4. At what magnitude can an earthquake cause displacement of buildings and cracks on the Earth’s surface?
             A. magnitude 4            B. magnitude 5    C. magnitude 6             D. magnitude 7
 
5. Where is an earthquake’s epicenter found?
             A. directly above the focus                               C. directly below the focus
             B. directly above the magnitude                    D. directly below the magnitude
 
6. Which of the following events causes  an earthquake?
             A. too much heat from the sun                     C. movement of crustal plates
             B. changing temperatures                                  D. mixtures of crustal plates
 
7. Where does an earthquake originate?
             A. epicenter                  B. focus                           C. intensity                    D. magnitude
 
8. What does PHIVOLCS mean?
             A. Philippine Institute of Volcanology
             B. Philippine Institute of Volcanologists
             C. Philippine Institute of Volcanology and Seismology
             D. Philippine Institute of Volcanologists and Seismologists
 
9. Which of the following refers to the ground above the focus?
             A. epicenter                  B. focus                           C. seismology               D. volcanology
 
10. What is the scale used by PHIVOLCS to measure the intensity of an earthquake?
             A. Richter Scale                                                    C. Richter Scale
             B. Richter Scale                                                     D. Richter Scale
 
11. Which layer of the Earth is the thickest?
             A. inner core                                                          C. mantle
             B. outer core                                                         D. crust
12. What separates the mantle from the crust?
             A. Gutenberg discontinuity                                C. asthenosphere
             B. Mohorovicic discontinuity                               D. solid part of the Earth
 
13. Why do crustal plates move?
             A. they are less dense than water                C. they lie on the liquid part of the mantle
             B. the winds push the plates                               D. there are spaces between the plates
 
14. ________________________ are the regions where the edge of an oceanic plate goes down to the mantle.
             A. earthquake zones                                           C. subduction zones
             B. magnitude zones                                             D. intensity zones
 
15. Which of the following is formed when two continental plates move toward each other and collide.
             A. rift                  B. mountain                  C. valley                         D. volcano
 
16. What is the focus of an earthquake?
             A. point in the earth where the rocks first break
             B. point in the ground where the tremor begins
             C. strength of an earthquake
             D. damage brought by an earthquake
 
17. Which of this is NOT observe when a volcano is about to erupt?
             A. earthquake                                         C. lahar
             B. rumbling sounds                                 D. unusual behavior of animals living near the volcano
 
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