Download Plate Tectonic Internet Activity

Plate Tectonic Internet Activity
Name __________________________
Go to http://volcano.und.nodak.edu/vwdocs/vwlessons/plate_tectonics/part1.html (Notice
that there is no www in the address). Answer the following questions.
1. What the three chemical layers of the earth?
2. What elements constitute the cores?
3. What is the difference between the inner and out cores?
4. What elements make up the mantle (list all 4)?
5. What elements make up the crust?
6. __________________ crust is made mostly of basalt, whereas _________________
is mostly made of _____________ and granite.
7. Which crust is denser?
8. What are the two parts to the lithosphere?
9. What solid layer can flow?
10. Next. Who originally proposed the theory of Continental Drift?
11. What were the five items he used to support hi theory?
12. What was the name of the super-continent?
13. Next. What continents was a fern located on?
14. Next. How did he use the rock sequence as evidence for his theory? Explain.
15. Next. Which continents (5) had glaciations?
16. Look at the present day climate zones. Ice is found at _________________ latitudes.
17. What are his two possible explanations for the glaciers on these five continents?
18. What was his final conclusion regarding the continents and the glaciers?
19. What is polar wandering?
20. What actually moves poles or plates?
21. Next. Give two contradictory beliefs to continental drift.
22. Why was his work not accepted by most in the Northern Hemisphere?
23. Who found the mechanism to move the plates?
24. What is the mechanism called?
25. Next. How deep and wide is the mid-Atlantic ridge?
26. Next. What did Harry Hess propose?
27. What produces the ocean floor?
28. Where did the floor go towards?
29. What is trench and give an example.
30. What moves the plates?
31. Next. Why do volcanic rocks have magnetization?
32. What differences did scientist find in the rocks?
33. What direction does the positive magnetism point?
34. What hemisphere does the negative magnetism point to?
35. Draw the zebra strip pattern that forms from the rift.
36. Next. _________________ in the mantle help carry the lithosphere __________the
ridge. The lithosphere arrives at the _______________, where it is
___________________or __________ into the asthenosphere. Thus, oceanic
lithosphere is _______________at mid-ocean ridges and _________________ at
subduction zones, areas where the lithosphere sinks into the asthenosphere.
_____________ are generated in the rigid plate as it is ___________ into the ______