Partner 1 True/False 1. The earthquakes that cause the most damage usually have a shallow focus. False 2. The New Madrid, Missouri, earthquake of 1812 resulted from movement along the San Andreas Fault. False 3. Most earthquakes occur near plate boundaries True 4. P waves move faster through liquids than through other material. False 5. Scientists analyze the difference between the arrival times of P waves and S waves to determine an earthquakes epicenter. True 6. An earthquake of a magnitude 2.5 is a major earthquake. False 7. Following simple safety rules during an earthquake can help prevent death and injury, True Fill in the Blank or Answer the question 8. When friction prevents the rocks on either side of a fault from moving past each other, the fault is said to be ___locked________________. 9. Geologists use the elastic rebound theory to explain ___earthquakes___________________. 10. How far below the earth’s surface do intermediate-­‐focus earthquakes occur? 70-­‐
300km 11. The Pacific Ring of Fire is an earthquake zone that forms a ring around the ________Pacific Ocean_____________________________. 12. Which type of seismic wave travels the fastest? P Waves 13. How many separate sensing devices make up a seismograph? 3 14. The Pacific Tsunami Warning Center (PTWC) issues warnings of ______Tsunamis___________________? 15. In general, where is the safest place for an individual to park when in a car during an earthquake? In the open Partner2 True/False 1. A fault zone is a group of interconnected faults. True 2. Plates are scraping past each other at the Eurasian-­‐Melanesian mountain belt. False 3. Surface waves are the fastest-­‐moving seismic waves. False 4. P waves moving through the earth can travel through solids, liquids, and gases. True 5. Scientists locate the epicenter of an earthquake by determining its magnitude. False 6. The magnitude of an earthquake is an approximate measure of how much energy the earthquake releases. True 7. Tsunamis are seismic waves that travel through the earth’s core. False 8. Scientists think that seismic gaps are likely locations of future earthquakes. True Fill in the Blank or Answer the question 9. The place where slippage first occurs is called an earthquakes _____Focus______________. 10. Describe aftershocks? Tremors that follows and is smaller than a major earthquake. 11. Ninety percent of continental earthquakes have __a shallow_________________ focus? 12. The force that can change the size and shape of rocks is called _____stress_______________. 13. In which major earthquake zone are earthquakes produced mainly by plates moving away from each other? Mid Ocean Ridge 14. An earthquake with a magnitude of 6.5 is classified as a _______moderate_________________. 15. The seismograph stations that make up the PTWC are located in and around the _____Pacific Ocean____________________________? Answer Sheet for Partner 1