Tectonic Plates

2. A pulling force.
4. The bending of rock layers.
8. Vibration caused by the rupture and sudden movement of rocks along a break or crack in Earth's crust.
10. boundary The boundary between two plates that slide past each other.
11. boundary The boundary between two plates that move toward each other.
12. The rigid outermost layer of Earth that includes the uppermost mantle and the crust.
16. The process by which new oceanic crust forms along a mid ocean ridge and older crust moves away.
17. currents The movement of fluids in a cycle because of convection.
18. A squeezing force.

1. Layer of Earth between the crust and the core
3. The process that occurs when one tectonic plate moves under another tectonic plate.
5. boundary The boundary between two plates that move away from each other.
6. core Liquid layer of the Earth's core.
7. Outer most layer of Earth.
9. The partially melted portion of the mantle below the lithosphere.
13. The lowest layer of the mantle.
14. drift Wegener's hypothesis which suggested that the continents are in consistent motion on Earth's surface.
15. A crack of a fracture in Earth's lithosphere along which movement occurs.