Name:                                                                                Period:      Date:                               EN:    

Review for Plate Tectonics Test

This is the first part of your review.  The second part is another triangulation activity.  You will have one of those on your test, so make sure you’re comfortable with the process.

1.     What gases did volcanoes contribute to Earth’s early atmosphere?



2.     What causes the movement of plates and where is it happening?



3.     How does the age of the ocean floor change as you get closer to the mid ocean ridge?



4.     Where is the oldest oceanic crust located?




5.     Where do we find most active volcanoes?



6.     How do oceanic crust and continental crust compare in terms of thickness and density?



7.     Draw diagrams to illustrate the direction of crustal movement at a transform boundary, a divergent boundary and a convergent boundary.













8.     Rank the following seismic waves in order of increasing speed:  S waves, P waves and L waves



9.     Which type of seismic wave can travel through liquids?


10. Which station had the latest arrival of P waves?  of S waves?  Which station had the earliest arrival of P waves?


11. Sticky, thicker lava has a lot of  _______________________.  Thin, runny lava


that is characteristic of sheild volcanoes results in a rock called _______________.

12. Violent eruptions, steep sides that have alternating layers are characteristic of what kind of volcano?


13. Describe in words what is happening at a transform boundary.





14. Describe in words what is happening at a divergent boundary.





15. Where is Earth’s magnetic field generated?



16. Where do scientists find a record of the location of Earth’s magnetic poles?




17. What happens at convergent boundaries?  Be specific, there are a couple different things.









18. According to the following diagram what direction is the Pacific Plate moving?


19. Which type of seismic wave travels the slowest and causes the most damage?


20. Describe the Earth’s asthenosphere.




21. Describe the shape of a shield volcano.




22. Describe the shape of a composite (strato) volcano.





23. What do we call the point where the first movement of rock occurs in an earthquake?




24. What type of volcano produces large pyroclastic flows?



25. What is a pyroclastic flow?





26. List three hazards associated with volcanoes.





27. List three things volcanologists monitor to determine if a volcano is “getting ready” to erupt.







28. Use the graph of p-wave and s-wave travel times to answer this question.  If an earthquake happens 1000 kilometers away from Piedmont, how long will it take before the first P-wave arrives?  How about the first S-wave?