Directions: Differentiate magnitude and intensity; active and inactive fault; and
Write TRUE if the statement is correct; FALSE if it is incorrect. Write your answers
epicenter and focus by determining
whether the statement given is correct or not.
on a separate sheet of paper.
1. Magnitude measures the energy released at the source of the earthquake.
2. Magnitude is determined based on the effect on people.
3. Intensity measures the strength of shaking produced by the earthquake at a
certain location.
4. Intensity is determined from measurements on seismograph.
5. The Modified Mercalli scale measures the intensity of an earthquake.
6. Active fault is one that has moved in the past and is expected to move again.
7. Active Fault will not generate earthquake again.
8. Geologists consider faults as active when there has been seismic activity
observed during the last 10,000 years.
9. Inactive fault has no structure but generates earthquakes.
10. Active and inactive faults generate earthquakes.
11. Epicenter is the spot directly above the focus on the surface of the Earth.
12. Epicenter is where the rocks first break and the movement is vast.
13. True. Focus is the point within the earth where seismic waves originated.
For items 14-15, refer to the figure on the right.
8.
14.Point A is called the epicenter.
15.Point B is called the focus.
A​