Plate Tectonics

3. ________ is a series of vibrations of earth.
4. _______ is a geological process in which the edge of the lithospheric plate slides underneath another.
5. Also known as seismic wave.
8. ________ is the process which occurs at the mid-ocan ridge.
10. The rigid outermost shell of earth is broken into __________.
14. The spreading of the seafloor.

1. Is the edge of a tectonic plate.
2. Is the transfer of heat
6. Maurice Ewing and Bruce Heezen discovered the _________.
7. The theory that the continents are slowly spreading apart.
9. The theory of _________ is that the outer layer of the earth is divided into a couple dozen plates that move across the earths surface.
11. When two plates collide.
12. When two plates move sideways with each other.
13. A long steep sided depression in the ocean floor.