Tectonic Plates

2. continental _______ is a theory that continents drift apart
7. outermost layer of the Earth
8. ___________ boundary is between two plates that are sliding past each other
10. molten rock in Earth's crust
12. ___________ boundary is between two plates moving away from each other
13. _________ plate is a piece of the lithosphere that moves on the asthenosphere
15. the bending of rock layers
16. a geological process in which one edge of a crustal plate is forced sideways and downward into the mantle below another plate
18. soft layer of the mantle
19. __________ boundary is between two colliding plates

1. a break in the Earth's crust
3. a pulling force
4. a _________ plate is a rigid layer of the Earth's crust that is believed to drift slowly
5. the innermost layer of the earth
6. layer between the crust and the core
9. sea-floor _________ is how a new lithosphere is created
11. outermost, rigid layer of the Earth
14. a squeezing force
17. caused by an earthquake or Earth vibration