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WARM-UP 12/07

WARM-UP 12/07. Copy the following questions down and wait to answer them until I play the sound clip after the bell. 1. What do you think is happening? 2. What kind of room was this recorded in? Why do you think this?. Earthquake Notes.

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WARM-UP 12/07

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  1. WARM-UP 12/07 • Copy the following questions down and wait to answer them until I play the sound clip after the bell. • 1. What do you think is happening? • 2. What kind of room was this recorded in? Why do you think this?

  2. Earthquake Notes

  3. Think about these questions, while viewing the following pictures… • 1. Why do earthquakes occur? • 2. Why do some locations such as California and Japan receive so many earthquakes? • 3. Can earthquakes be predicted? • 4. Can we design a city to better withstand an earthquake? • 5. Can we stop earthquakes before they occur? Should we try?

  4. Watch this short clip…

  5. What is an earthquake? • Used to describe both sudden slip on a fault, and the resulting ground shaking and radiated seismic energy caused by the slip • Caused by volcanic or magmatic activity • Caused by other sudden stress changes in the earth.

  6. Three Types of Faults Strike-Slip Thrust Normal

  7. What causes earthquakes? • Tectonic plates move past each other causing stress. Stress causes the rock to deform

  8. Primary Waves (P Waves) • A type of seismic wave that compresses and expands the ground • The first wave to arrive at an earthquake http://daphne.meccahosting.com/~a0000e89/insideearth2.htm

  9. Secondary Waves (S Waves) • A type of seismic wave that moves the ground up and down or side to side http://daphne.meccahosting.com/~a0000e89/insideearth2.htm

  10. Surface Waves • Move along the Earth’s surface • Produces motion in the upper crust • Motion can be up and down • Motion can be around • Motion can be back and forth • Travel more slowly than S and P waves • More destructive

  11. How do scientists calculate how far a location is from the epicenter of an earthquake? • Scientists calculate the difference between arrival times of the P waves and S waves • The further away an earthquake is, the greater the time between the arrival of the P waves and the S waves

  12. How are Earthquakes Measured? Richter Scale

  13. How are Earthquakes Measured? Mercalli Intensity Scale Click Link for Interactive Demo http://elearning.niu.edu/simulations/images/S_portfolio/Mercalli/Mercalli_Scale.swf

  14. Google Earth…Real time Earthquakes

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