1. You were provided with data showing the arrival time of the P and S - waves recorded from three seismic stations. Which of these can you possibly determine?
a.the damage at the focus
c. the distance to the earthquake
b.the location of the epicenter
d. the intensity of the earthquake
2. From the seismogram, the distance to the epicenter can be determined by measuring the aspeed of the surface wave
a.speed of the surface wave
b.arrival time of surface wave
c. ratio of the amplitude of the largest P and S-waves b.arrival tirne of surface wave
d. difference in the arrival times of the P and S-waves
3. Why do you think it is important to determine the epicenter of the earthquakes?
a. To ensure the safety of the place.
b.to determine the focus of the earthquake
c. to determine how far way the earthquake occur
d. To determine the foundation of plate tectonic activities
4. Which of the following statements is true about tsunamis?
I. They are also called harbor wave.
II. Volcanic eruptions and meteorite impact cannot generate tsunamis.
III. Tsunami can be generated when the sea floor suddenly deforms and vertically displaces the overlying water.
a. I only c. I and III b.II only d. I. II and III
5. When two plates collide, the oceanic crust usually subduct beneath the continental crust because it is
a.denser than continental crust
c. thicker than continental crust
b.less dense than continental crust
d. thinner that continental crust
6. Crustal plate A is moving away from crustal plate B. What is the expected average rate of change in position between A and B?
a. A few centimeters per year
c. a few millimeters per century
b. A few meters per month
d. a few millimeters per day
7. Which plate is formed between the Philippine plate and the Eurasian plate?
a.convergent
c. reverse fault
b.divergent
d. transform fault
8. Which of the three main plate boundary is the least common?
a.Convergent. c. Transform
b.Divergent. d. All are equally common​