Plate Tectonics
Across
- 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
Down
- 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