Across
- 5. Oceanic lithosphere is ________ and more dense than Continental Lithosphere
- 7. Feature formed at subduction zones on less dense plate
- 8. Feature showing steep decline in ocean due to plates bending down; found at subduction zones
- 10. Rigid portion of Earth; Contains the plates
- 12. Continental Lithosphere is ________ and less dense than Oceanic Lithosphere
- 14. Harry Hess' hypothesis about what happens in the ocean to oceanic plates
- 17. movement of heat and material within the mantle; mechanism for Plate Tectonics
- 19. Heat energy source of Earth; unstable element turns into stable element
Down
- 1. convergent plate boundary where one plate moves under another
- 2. describing plates or crust that are under the ocean
- 3. Matthews and Vine found Magnetic ______ reversals in the ocean rock; supported Hess' hypothesis
- 4. Layer of Earth made of Iron and Nickel; is the heat source for convection
- 6. Layer of earth made of rock that is "plastic" due to heat and pressure
- 9. map of world showing elevations
- 11. map of world showing natural surfaces
- 13. early theory of Earth movement; did not have mechanism, so it was rejected
- 15. describing plates or crust that contain landmasses
- 16. rise in midde of ocean where magma rises to surface; found at divergent boundaries
- 18. geologic event from tectonic plates shift; can kill thousands