Thursday, May 16, 2013

Earthquake Lab: find the epicenter (5/20 to 5/24)

How did you do on this Quiz? check your answer by doing it again online.

It's An Earthquake Song


 



http://www.sciencecourseware.com/virtualearthquake/vquakeexecute.html


Conclusion Questions from the lab...


1. After drawing the circle for Balboa Heights, can you tell the location of the epicenter? Explain your answer.

2. After drawing a circle for Boulder Colorado, you have two circles on your map. Relative to these two circles, can you tell the location of the epicenter/ Explain your answer.

3. After drawing the circle for Mexico City, you have three circles on your map. Relative to these three circles, can you tell the location of the epicenter? Explain  your answer. How accurate was your work? How can you tell?

4. What is the minimum number of seismographic stations necessary to pinpoint an earthquake? Why?


Test your skills

1. according to the P and S save time-travel graph, how long does it take a P wave to travel 6000 km?

2. How long does it take an S wave to travel 6000 km?

3. What is the difference in arrival times for P-wave and S- wave that have traveled 6000 km?

4. What is the distance to the epicenter if the difference in the arrival time of the P wave and S wave
     is 5 minute and 30 seconds?

5. As the distance to epicenter increases, how does the amount of time by which the S-wave lags behind
     the P-wave change? explain your answer.

6. Where would you be located if there is no lag time between P-wave and S-wave in an earthquake?  

7. Calculate the average speed of "P" wave from 0 to 10 minutes to the nearest tenth. Show your formula and calculations with correct units and rounding.

8. Calculate the average speed of "S" wave from 0 to 10 minutes to the nearest tenth. Show your formula and calculations with correct units and rounding.

9. List the differences between P and S waves.

10. How would you prepare for an earthquake and Tsunami?




Earthquake Triangulation Activity


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