7 Earthquakes occurring on the ocean floor can cause the formation of giant waves called
a.tidal wave b. ocean surge
c. lahar d. tsunami

8. In transform boundaries, the plates move
a.in opposite directions to each other.
b. away from each other.
c. toward each other.
d. on top of each other,

9. Which of the following describes an S wave? a. It can pass through solids, liquids and gases. b. It can pass through solids only.
c. It can pass through liquids and gas only.
d. It can be detected in the shadow zone.

10. The behavior of seismic waves made seismologists infer that the interior of the earth is made up of
a.solid b. liquid outer core
c.liquid d. solid outer core

11. In the PEIS, earthquakes with intensity I to IV are considered
a.strong c. destructive
b. weak d. very strong

12. Which of the following statements is TRUE?
a. Seismic waves move through the earth without changing speeds.
b. The speeds of seismic waves are affected by the material through which they travel.
C. Shadow zones are areas in which only P waves are detected.
d. Seismic waves travel only on the earth's surface.

13. Which of the following scales give a more accurate recording of seismic waves?
a. Mercalli Scale c. Richter Scale
b. Seismogram Scale d. Moment Magnitude Scale

14. The Philippines together with Japan and the other islands in the western Pacific were the result of what kind of plate boundaries?
a.convergent. c. divergent
b. transform d.slide

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