3. Which is determined by observing the effects of the earthquake in different places?
B. intensity
A. focus
C. epicenter
D. magnitude
4. Which of the following correctly describes the focus of an earthquake?
A. The focus is any movement or shaking of the ground
B. Focus measures the energy released at the source of the earthquake
C. The focus is the point within the earth where rock first breaks or moves
D. The focus is the break on the rock along which the movement of the earth's crust
Occurs.
5. How is the severity of an earthquake expressed?
A. It is expressed in terms of magnitude only
B. It is expressed either in terms of focus and epicenter.
C. It is expressed either in terms of its magnitude or intensity.
D. It is expressed in terms of the kinds of seismic waves produced.
6. Which term refers to the amount of energy released by the earthquake?
A. focus
B. intensity
C. epicenter
D. magnitude
7. A Richter scale was used to measure an earthquake and a magnitude of 5.6 was
obtained. What would be the magnitude of an earthquake 1000 times stronger?
A. 10
B. 9.6
C. 8.6
D. 7.6
8. What is the difference between magnitude and intensity?
A. Magnitude refers to the amount of energy while intensity refers to how much
damage was done
B. Magnitude refers to the how much damage was done while intensity refers to the
amount of energy
C. Magnitude is measured in Modified Mercalli Scale while intensity is measured in
Richter scale.
D. Magnitude tells us the focus of the earthquake while intensity tells us the
epicenter
9. How many seismograph stations are needed to locate the epicenter of an
earthquake?
A. 4
B. 3
C. 2
D. 1​