Earth's Formation and Plate Tectonics

3. name of large land mass that eventually split apart
7. movement of molten iron in the outer core creates the _ that surrounds the earth
9. an island _ forms when subduction happens between two ocean plates
12. plate boundary where 2 plates are sliding alongside each other
13. layer of the earth that is solid but soft enough to move very slowly
15. these waves are used to determine the depths and composition of earth's layers
17. Wegener's first name
19. the lithosphere is broken into pieces called _ plates
20. plate boundary where 2 plates are moving away from each other
22. underwater volcanic mountains that form where 2 ocean plates are diverging
23. there are 2 types of plates, _ and continental
27. Wegener noticed that the _ of the continents fit together like a puzzle

1. formed when 2 continental plates move into each other
2. along with the islands of the same name, example of subduction zone
4. continent where the Great Rift Valley is found
5. uppermost functional layer of the earth
6. scientist who first proposed continental drift
8. example of collision zone
10. plate boundary where 2 plates are moving towards each other
11. this kind of valley forms when a continental plate is pulling apart
14. famous example of transform boundary
16. this type of electricity may have brought dust particles together in the planetary nebula
18. when subduction occurs it always creates a volcano and a _
21. Wegener noticed that _ grooves on different continents showed that they had been in places much colder in the past
22. Wegener noticed that _ laters on different continents were the same
24. process of warmer material rising and cooler material sinking. This causes the tectonic plates to move.
25. Wegener noticed that _ of plants and animals on different continents matched
26. when earth was molten, materials sank r rose based on their _