Plate Techtonics

4. The 'n' or horseshoe shaped area where volcanic eruptions and earthquakes take places more commenly.
5. One of the largest indefinite units of geological time
6. The force drawing the body away from it's rotaional point
7. The layer of the Earth's surface that is made up of living organisms
9. A type of rock made of compacted sediments
12. A regular occurance caused by the positions of the Sun and Moon around the Earth
14. Something that happens when heated molecules move around
16. A word used in terms with earthquakes and vibrations in the Earth's crust
20. A part of ocianic crust or the upper mantle that has been pushed above sea level
21. The process when the continents broke apart

1. A type of techtonic plate boundary where two plates are moving away from eachother
2. A type of rock that undergoes great amounts of heat and pressure
3. The landmass on Earth before continental drift
8. The process where one edge of a tectonic plate is force beneath that of another
10. A type of rock made from a cooled liquid
11. A bit of cold water from deep in the ocean that rises up to the surface waters
13. A type of techtonic plate boundary where two plates are sliding towards eachother
15. A rounded landform that protrudes from the Earth's surface
17. A floating piece of ice that occurs on Earth
18. A type of temperature change where the heated air becomes thin
19. A compound that contains silicon with anionic properties