RAP: 1. ______deepest part of the ocean floor (ocean floor) 2. ______ type of convergent plate boundary where 2 plates collide and form mountains (plate features) 3. ______layer of the mantle that is made of molten rock that the lithosphere floats on (layers of Earth)

Earthquakes Key Questions 1. What is seismology? 2. What is a seismologist? 3. What is a seismograph? 4. What is a seismogram? 5. What is the Richtor Scale? 6. What is the Moho? 7. 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. Wrap the paper around a pencil and hold the pencil on each end  2. Put another pencil on top of the paper  3. Pull the end of the paper slowly  4. Move the book back and forth

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  Seismic waves S waves  P waves elastic rebound  Seismology shadow zone  Focus epicenter  Fault moho  Seismograph gap hypothesis  Seismogram seismic gap  deformation