Tectonic Plates
Across
- 2. reptile fossil found in South America and Africa
- 4. earths biggest plate
- 5. is a famous divergent boundary
- 8. this is formed when two plates crash into each other and crumple
- 10. fossil plant found in, Africa, Australia, India, South America, and Antartica
- 11. this rigid layer is about 100m thick genrally is less dense than material underneath
- 13. earths crust and part of the upper mantle are broken into sections
- 15. a version of this same process, occurring in the mantle, is thought to be the force behind plate tectonics
- 17. suggested the theory of seafloor spreading
- 18. plastic like layer of the mantle
- 19. mountains similar to those in Greenland and Western Europe
Down
- 1. __________Boundary; two plates are moving together, sometimes plates subduct under each other
- 3. Hess's theory that new seafloor is formed when magma is forced upward toward the surface at the mid-ocean ridge
- 6. evidence that africa was once cold
- 7. plates flout on the plastic like layer of the ______
- 9. _________Boundary; two plates slide past each other, can move in opposite directions, can move in same direction at different rates
- 12. Wegner's name for one large landmass
- 14. the plastic like layer below the lithosphere
- 15. slow movement of continents
- 16. earthquakes are very common in this state