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Plate Tectonics
p.229 – Plate Tectonics
1. Is there a difference between plates, lithospheric plates, and tectonic plates? (Yes/No)
2. Approximately how much do the lithospheric plates move each year?
p.230
3. Study figure 12-3. What do these diagrams show us about the positions of the continents?
p.231
4. Define Divergent Plate Boundary:
5. Draw a picture simple picture of a divergent plate boundary in the box below
6. What features other than lava flows are associated with divergent boundaries?
7. When divergence is within the oceanic crust, the faulting and volcanic activity result in
a___________________________, a mountain range at the bottom of the ocean that is composed
mostly of volcanoes and lava flows. The mid-ocean ridges often have a central depression or
______________________ , as shown in figures 12-14b.
8. Define Convergent Plate Boundary:
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9. There are 3 varieties of convergent plate boundaries:
A. Oceanic   Oceanic
B. Continental   Continental
C. ___________   _________________
10. Which varieties result in Subduction?
11. What decides which of the colliding plates is subducted?
p.233
12. What happens when two continental plates collide? Name an example.
13. What is the name of the famous Transform Plate Boundary in the United States?
14. What is the driving force behind Plate Tectonics?
p.234 – Effects of Plate Tectonics (I think this is better titled Evidence for Plate Tectonics)
15. What about the appearance of the continents suggests the existence of a past supercontinent?
16. How can the fossil remains of a creature like Glossopteris or Mesosaurus lend credit to the
theory of plate tectonics?
17. What is strange about finding coal deposits near the poles and evidence of glaciation near the
equator? How does the theory of plate tectonics explain these observations?
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Age of bedrock
18. What is the relationship between age of the bedrock and the distance from the mid-ocean ridge?
(Write it in words first and then show it graphically as well).
Distance from mid-ocean ridge 
p.235
19. What happens to Earth’s magnetic poles every several thousands of years?
p236
20. List 3 other effects that plate movement will or has on the Earth and its inhabitants.
1.
2.
3.
p237
Question 49-53 you must use the diagram on page 236
Page 5 of your ESRT’s may be needed to answer some of the questions below
Please note, you are not answering all questions in this section.
49. _____
50._____
51._____
52._____
59._____
60._____
61._____
62._____
64._____
66._____
67._____
68._____
53._____
54._____
55._____
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