Plate Tectonics
Across
- 2. adjoins the crust to form the lithosphere.
- 6. two plates that move apart or rift.
- 7. when the denser oceanic plate subducts under the other one.
- 10. made mostly up of iron, very hot.
- 13. two plates that are sliding past each other.
- 17. the gradual movement as the continents drift apart over time.
- 18. solid rock that flows slowly.
- 19. liquid layer.
- 20. when the material pushes upward after the collision of two plates.
Down
- 1. process that occurs at mid-ocean ridges where oceanic crust is formed where volcanic activity has occurred.
- 3. a scientific theory that explains the earth's continental movements.
- 4. the middle layer and one of the thickest layers of the earth.
- 5. the collision of two plates.
- 8. when a more dense oceanic plate slides under a less dense continental plate.
- 9. when the denser oceanic plate subducts under the continental plate.
- 11. a supercontinent that incorporated almost all of the continents together a few hundred years ago.
- 12. apart of the middle layer and has a higher temperature and pressure than the upper mantle.
- 14. rigid outer layer (crust).
- 15. solid very dense.
- 16. outer layer.