Plate Tectonics

2. Imaginary lines on a map that show points of the same age formed at the same time
3. Huge pieces of earth's crust that cover it's surface and fit together at their edges
5. Man who first hypothisized that there was once a super continent
10. When two plates are moving away from one another
13. When two plate slide past eachother
17. Device used to decdect small charges in the magnetic field
18. Where when converging, one plate goes underneath another plate
19. The Hyp. that new ocean crust is formed at mid ocean ridges and recycled at deep sea trenches

1. Wegener's Hyp. that earths continents were joined into a single supercontinent
4. Name of the Class
6. Where two plates are moving towards one another
7. The force that drives the tectonic plates in there direction
8. The formation that occurs at a continental convergent boundary
9. Study of earth's magnetic record using data gathered from iron bearing minerals
11. The formation that occurs at an oceanic divergent boundary
12. When earth's magnetic field changes polarity between normal and reversed
14. Long narrow valley that forms at a divergent boundary
15. Wieght of an elevated ridge pushes an oceanic plate towards a subduction zone
16. Process that determines tectonic movement
20. The very first supercontinent that has been recorded
21. Ancient landmass made up of all the continents that began to break apart 200 MYA