Tectonic Plates

4. a break in the Earth's crust
7. sea-floor _________ is how a new lithosphere is created
8. a _________ plate is a rigid layer of the Earth's crust that is believed to drift slowly
9. outermost, rigid layer of the Earth
10. a squeezing force
13. a pulling force
14. __________ boundary is between two colliding plates
16. continental _______ is a theory that continents drift apart
17. outermost layer of the Earth
18. caused by an earthquake or Earth vibration

1. the bending of rock layers
2. layer between the crust and the core
3. a geological process in which one edge of a crustal plate is forced sideways and downward into the mantle below another plate
5. soft layer of the mantle
6. molten rock in Earth's crust
11. _________ plate is a piece of the lithosphere that moves on the asthenosphere
12. ___________ boundary is between two plates moving away from each other
15. ___________ boundary is between two plates that are sliding past each other
19. the innermost layer of the earth