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CH 8

CH 8. A fault is ____. a.a place on Earth where earthquakes cannot occur b.a fracture in the Earth where movement has occurred c.the place on Earth’s surface where structures move during an earthquake d.another name for an earthquake. CH 8. An earthquake’s epicenter is ____.

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CH 8

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  1. CH 8 A fault is ____. • a.a place on Earth where earthquakes cannot occur • b.a fracture in the Earth where movement has occurred • c.the place on Earth’s surface where structures move during an earthquake • d.another name for an earthquake

  2. CH 8 An earthquake’s epicenter is ____. • a.the place on the surface directly above the focus • b.a spot halfway between the focus and the surface • c.the spot below the focus • d.any spot along the nearest fault

  3. CH 8 When an earthquake occurs, energy radiates in all directions from its source, which is called the ____. • a.epicenter • b.focus • c.fault • d.seismic center

  4. CH 8 Earthquakes are usually associated with ____. • a.violent weather • b.faults • c.large cities • d.the east coast of North America

  5. CH 8 Which of the following causes earthquakes? • a.elastic rebound • b.Richter scale • c.release of heat • d.frictional heating

  6. CH 8 • The hypothesis that explains the release of energy during an earthquake is called the ____. • a.Richter hypothesis • b.moment magnitude hypothesis • c.vibration hypothesis • d.elastic rebound hypothesis

  7. CH 8 Most earthquakes are produced by the rapid release of which kind of energy stored in rock subjected to great forces? • a.chemical • b.thermal • c.elastic • d.mechanical

  8. CH 8 During an earthquake, the ground surface ____. • a.moves only in a horizontal direction • b.moves only in a vertical direction • c.can move in any direction • d.does not move

  9. CH 8 The adjustments of materials that follow a major earthquake often generate smaller earthquakes called ____. • a.foreshocks • b.surface waves • c.aftershocks • d.body waves

  10. CH 8 Tsunamis are ____. • a.often generated by movements of the ocean floor • b.waves that are produced by tidal forces • c.waves that cannot cause damage on land • d.also known as tidal waves

  11. CH 8 A succession of ocean waves set in motion by a submarine earthquake is called a(n) ____. • a.compression wave • b.underwater landslide • c.tsunami • d.liquefaction

  12. CH 8 A tsunami can occur when there is vertical movement at a fault under ____. • a.a mountain range • b.the San Andreas Fault • c.the ocean floor • d.a small inland lake

  13. CH 8 Which of the following is used in an attempt to make short-range predictions of when earthquakes will occur? • a.strain in rocks near faults • b.height of ocean waves after earthquakes • c.changes in the color of rocks near faults • d.study of historical records

  14. CH 8 Long-range earthquake forecasts are based on the idea that earthquakes are ____. • a.random • b.destructive • c.fully understood • d.repetitive

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