Tectonic Plates

2. continental _______ is a theory that continents drift apart
5. a _________ plate is a rigid layer of the Earth's crust that is believed to drift slowly
6. outermost, rigid layer of the Earth
7. outermost layer of the Earth
9. a geological process in which one edge of a crustal plate is forced sideways and downward into the mantle below another plate
12. a squeezing force
14. layer between the crust and the core
16. a pulling force
18. sea-floor _________ is how a new lithosphere is created
19. molten rock in Earth's crust

1. the innermost layer of the earth
3. _________ plate is a piece of the lithosphere that moves on the asthenosphere
4. soft layer of the mantle
8. caused by an earthquake or Earth vibration
10. __________ boundary is between two colliding plates
11. ___________ boundary is between two plates moving away from each other
13. a break in the Earth's crust
15. ___________ boundary is between two plates that are sliding past each other
17. the bending of rock layers