Plate Tectonics
Across
- 4. the denser weaker layer beneath the lithospheric mantle
- 5. The thickest layer of all three layers that is responsible for convection currents
- 7. Pangaea had broken apart into are country this breakage is called
- 10. A part of the earths center that is liquid
- 11. When two plates move away from each other
- 13. The center of the earth
- 16. When two plates move side by side
- 18. The last mechanical layer that is made of Iron and Nikel
- 19. The small layer that makes up the crust and upper mantle
Down
- 1. Occurs as tectonic plates are pushed together and the crust becomes shorter and thicker
- 2. Lines crated my plate moments
- 3. When two plates come together
- 6. A massive, irregularly shaped slab of solid rock, generally composed of both continental and oceanic lithosphere
- 8. The earths crust is split into ____
- 9. Discovered by Harry Hess
- 12. When a oceanic plate moves under a continental plate
- 14. This is the stiffer part of the mantle under the asthenosphere
- 15. A thin top most area of the earth surface that is divided into plates
- 17. The rigid outer layer of the Earth that remains mechanically strong over geological time spans