Plate Tectonics

3. heated lower rock that rises toward the top because it is less dense than the surrounding mantle rock.
9. Greek for "All Land"
10. cause the plates to move from the heat going up and cooling down
11. lava flows underwater
12. two plates slide past one another
14. valley on the ocean floor
16. - plates come together
17. rock moving against rock along a fault causing the rock surface to become polished
19. Idea that continents move around on Earth's Surface

1. theory explaining how the pieces of Earth's Surface move
2. striped patterns that are formed in patterns as magnetic materials in the new rocks cool
4. long chain of undersea mountains
5. large pieces of Earth's lithosphere that move other the asthenosphere
6. plates move apart
7. thin lithospheric plates that dense
8. thick lithospheric plates that are less dense
13. German Scientist and Arctic Explorer who suggested the concept of continental drift
15. geophysicist and naval officer mapped the ocean floor
17. hypothesis that new floor is created and continents are pushed apart from each other
18. process that involves plates sinking into the mantle