Earth Science! Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. ____ 1. The point beneath Earth’s surface where rock breaks under stress and triggers an earthquake is called the a. syncline. b. footwall. c. epicenter. d. focus. ____ 2. The type of seismic waves that arrive at the surface first and move by compressing and expanding the ground like an accordion are called a. S waves. b. P waves. c. Surface waves. d. Mercalli waves. ____ 3. S waves are also known as a. primary waves. b. secondary c. surface waves. d. focus waves. ____ 4. Compared to P and S waves, surface waves move a. faster. b. slower. c. at the same rate. d. farther from the epicenter. ____ 5. What does a seismograph record? a. the Mercalli scale rating for an earthquake b. the speed of seismic waves c. the ground movements caused by seismic waves d. the location of the epicenter ____ 6. If the Coast Guard warns of a giant wave of water approaching the shore as a result of a major earthquake, they are warning of a. an aftershock. b. liquefaction.
Earth Science! Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. ____ 1. The point beneath Earth’s surface where rock breaks under stress and triggers an earthquake is called the a. syncline. b. footwall. c. epicenter. d. focus. ____ 2. The type of seismic waves that arrive at the surface first and move by compressing and expanding the ground like an accordion are called a. S waves. b. P waves. c. Surface waves. d. Mercalli waves. ____ 3. S waves are also known as a. primary waves. b. secondary c. surface waves. d. focus waves. ____ 4. Compared to P and S waves, surface waves move a. faster. b. slower. c. at the same rate. d. farther from the epicenter. ____ 5. What does a seismograph record? a. the Mercalli scale rating for an earthquake b. the speed of seismic waves c. the ground movements caused by seismic waves d. the location of the epicenter ____ 6. If the Coast Guard warns of a giant wave of water approaching the shore as a result of a major earthquake, they are warning of a. an aftershock. b. liquefaction.
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