Geophysical: Plate Tectonics Review
Name: _______________________
NOTES, LABS, and textbook.
1. What are the 3 plate boundaries (give the term) and describe what the plates are doing:
1) _______________ - _______________________________________________________
2) _______________ - _______________________________________________________
3) _______________ - _______________________________________________________
2. In a convergent boundary, name and describe what happens if you have the following boundary:
Crust:
Name (subduction or collision)
Description:
Continent-Continent ________________
_______________________________________
Continent-ocean
________________
_______________________________________
Ocean-Ocean
________________
_______________________________________
3. Provide real world examples of the following: a. Collision Zones: ____________________________
b. divergent: ________________________ c. subduction: ____________________________
4. Provide 3 possible forces that drive plate tectonics and explain:
1) _______________________________________________________________________
________________________________________________________________________________
2) _______________________________________________________________________
________________________________________________________________________________
3) _______________________________________________________________________
________________________________________________________________________________
5. Explain why basaltic (mafic)crust subducts when it collides with continental (felsic) granite: ________
_________________________________________________________
6. What role does the asthenosphere play in plate tectonics? _________________________________
_________________________________________________________
7. How is it different from the lithosphere? ______________________________________________
_________________________________________________________
8. What is the pattern of magnetism found on the ocean floor and how does it relate to seafloor
spreading? _____________________________________________________________________
_________________________________________________________
9. Wegener had 6 pieces of evidence to support his theory of continental drift, describe 5 of them:
1)
2)
3)
4)
5)
10. Why wasn’t Wegener’s theory accepted? ______________________________________________
11. Explain why the rock of the ocean floor is youngest at the center and oldest near the continents:
_________________________________________________________
_________________________________________________________
12. Where are the deepest parts of the oceans? Why?_____________________________________
_________________________________________________________
13. What are island arcs? ____________________________________________________________
How are they different from volcanic arcs found on land? _____________________________________
_________________________________________________________
14. What crust is older, continental or oceanic? _________________ Why? ______________________
_________________________________________________________
15. If the crust is being created constantly at spreading centers (ridges), why is the earth staying the
same size?
_________________________________________________________
16. Define:
trench mid-ocean ridge 17. Think about the rock cycle. At which type of boundary would the formation of igneous rocks take
place? (convergent, divergent, transform). How about metamorphic rocks?