Plate Tectonics

2. happens when divergent boundary occur(land)
5. an area where a large number of earthquakes and volcanic eruptions occur in the basin of the pacific ocean
8. where 2 plates slide past each other
11. Theory by J. Tuzo Wilson
16. where 2 plates collide
19. single landmass or supercontinent
20. rocks that make up the ocean floor lies in patterns of this

1. convection currrents under the lithosphere push new crust that forms at the mid-ocean ridge away from the ridge and towrd this
3. happens when transform boundary occur
4. happens when collision boundary occur
6. any trace of an ancient organism that has been preserved in rock
7. the rigid, rocky outer surface of the Earth
9. break in Earth's crust where rocks have slipped past each other
10. where 2 plates move away
12. Crust broken up into
13. Theory by Alfred Wegener
14. under the Athenosphere
15. Theory by Harry Hess
17. device that bounces sound waves off underwater objects than back
18. a fern like plant