1. Is a break in the earth’s crust, and along the break, significant movement has taken place?
a. epicenter b. fault
c. focus d. magnitude
2. An earthquake is caused by ____
a. cooling of the earth’s interior
b. something that slips on a fault
c. the earth as it rotates around its axis
d. rocks that break along a zone of weakness
3. Which of the following forces will cause a thinning and elongation of the earth’s crust?
a. compression b. parallel
c. shearing d. tension
4. Fault or fold of a plate depends on its
a. density b. flexibility under force
c. mass d. shape and size
5. Faults can suddenly form during earthquakes
a. false b. maybe
c. possible d. true
6. What are the pieces of the Earth's crust called?
a. Continents b. Plates
c. Puzzle pieces d. Rocks
7. Great earthquakes, on average, occur
a. 500 times annually
b. 100 times annually
c. 20 times annually
d. once every 5 to 10 years
8. How will you describe the appearance of a fault? A break
a. on the earth’s surface that extends to many direction
b. in the earth’s crust, and along the break
c. that extends from the earth’s surface to the interior of the earth
d. from the interior of the earth that extends up to the surface
9. Earthquakes are produced during:
a. brittle failure during faulting
b. growing during folding
c. lessening during faulting
d. plastic failure within the mantle
10. Geologists cannot yet predict earthquakes because they
a. have to much data
b. are too many faults to monitor
c. need to know where all past earthquakes occurred
d. can’t be sure when and where stress will be released along a fault.
11. Which of the following are not included in the list of active faults in the Philippines?
a. Marikina valley fault b. West Philippine sea
c. Mindanao valley fault d. Central Philippine fault
12. All of the following ways are used by scientist in finding out if a fault is active or not?
a. Historical records b. Vibrations for faults
c. Observing the surroundings d. Climate of the country
13. It is the measure of the energy released at the focus of the source of the earthquake.
a. Focus b. Magnitude
c. Intensity d. Epicenter
14. What do you call the strength of the shaking produced by the earthquake as observed by people at a certain location?
a. Intensity b. Epicenter
c. Focus d. Magnitude


15. What happens to the intensity of an earthquake as the distance from the epicenter increases?
a. Increases b. The same
c. Decreases d. Undetermined
16. How will you describe the appearance of a fault?
a. Is the break on the earths surface that extends to many direction
b. Is a break in the earths crust and along the break
c. Is a line breaks that extends from the earths surface to the interior of the earth
d. Is a break from the inferior of the earth that extends up to the surface
17. A break in the earth’s crust and along the break sigma frost movement has taken place
a. Fault b. Focus
c. Epicenter d. Magnitude
18. If the seafloor is suddenly displaced upward, then what happens to the sea surface? The sea surface will
a. Subside b. momentarily rise
c. subside then rise d. remain unchanged
19. What does the word "tsunami" mean in Japanese?
a. Century wave b. Harbor wave
c. Killer wave d. Tidal wave
20. The following are instances on how underwater earthquakes generate tsunamis. Which does not demonstrate such characteristics?
a. The sudden upward or downward movement of the seafloor during an earthquake
b. An extra lump of water at the surface will collapse under gravity to produce a series of waves
c. The underwater earthquake have to be sufficiently large to displace a massive amount of water
d. Slight shaking of the sea floor would already cause tsunami since water is sensitive to movement.
21. Most major tsunamis are produced by earthquakes with magnitudes greater than
a. 5 b. 6
c. 7 d. 8
22. Using data from seismic waves, geologists have learned that Earth’s interior is made of
a. continents c. layers
b. ridges d. trenches
23. The composition of the Earth’s interior affects
a. how long an earthquake will last
b. the location of an earthquake’s focus
c. the speed and direction of seismic waves
d. the strength of an earthquake
24. Good evidence that the Earth has a layered structure is when seismic waves:
a. suddenly change paths when the density abruptly changes.
b. travel in gently curving paths due to refraction.
c. travel in gently curving paths due to diffraction
d. travel in straight lines through the Earth
25. What conditions do tropical cyclones form?
a. It needs raindrops in order to form
b. It needs cold ocean waters to be able to develop
c. It requires warm ocean waters to be able to develop
d. The temperature of the ocean water must be less than 20 degree Celsius
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