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DO NOW. ______the point on the Earth’s surface directly above an earthquakes starting point ______ energy source that uses falling water ______lower layer of mantle ______pointy extinct volcano ______ instruments located at or near Earth’s surface that record seismic waves.
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DO NOW ______the point on the Earth’s surface directly above an earthquakes starting point ______ energy source that uses falling water ______lower layer of mantle ______pointy extinct volcano ______ instruments located at or near Earth’s surface that record seismic waves
Earthquakes Key Questions What is seismology? What is a seismologist? What is a seismograph? What is a seismogram? What is the Richtor Scale? What is the Moho? Why does the west coast of the United States have more earthquakes?
1. Seismology-study of earthquakes • 2. Seismologist-scientist that studies earthquakes • 3. Seismograph-instruments located at or near Earth’s surface that record seismic waves • 4. Seismogram-tracing of earthquake motion created by a seismograph • 5. Richtor Scale-scale used to measure an earthquakes strength • 6. Moho-the boundary between the crust and mantle where seismic waves increase in speed • 7. The west coast has more earthquakes because it is in the Ring of Fire on a plate boundary
Seismograph Lab • 1. What instrument did your group create? • 2. What did the pen mark represent? • 3. How did the line on the paper change from gentle shaking to stronger shaking?
Words for Crossword Puzzle pg 196-213 • Seismic waves S waves • P waves elastic rebound • Seismology shadow zone • Focus epicenter • Fault moho • Seismograph gap hypothesis • Seismogram seismic gap • deformation
