Tectonic Plates

2. hard magnetic middle of the earth.
5. the proper name for mountain making.
6. plates collide.
7. old and buoyant.
11. the innermost part of the earth.
13. where we live
14. these shouldn't be crossed.
16. a huge wave that usually causes death and distress.
17. middle and biggest layer.
19. an opening in the surface of a planetary mass.
20. a fracture in which there has been movement of plates on one or both sides.

1. plates split.
3. rigid outermost shell.
4. young and dense.
8. the core is made of this.
9. a sudden and violent shaking of the ground. a release of energy in the earth.
10. A theory that the earth's surface is made up of large slowly moving sections.
12. ring of volcanoes in the Pacific.
15. all the continents together. how it used to be.
18. plates pass by each other.