Plate tectonics

3. vibrations that travel through Earth carrying the energy released during an earthquake
5. A weak spot in the crust where magma has come to the surface
10. earth's outermost layer of rock made up of both dry land and ocean floor ocean
12. A theory stating that the earth's surface is broken into plates that move.
15. a split, break, or breach
17. Places where tectonic plates slide along beside one another as they move
18. A supercontinent containing all of Earth's land that existed about 225 million years ago.
19. The process by which molten material adds new oceanic crust to the ocean floor
20. a scientist who studies the forces that make and shape planet earth

1. The hypothesis that states that the continents once formed a single landmass, broke up, and drifted to their present locations
2. Lie beneath landmasses. Contains more silicon dioxide. Plates less dense than oceanic.
4. North American, South American, Pacific, African, Eurasian, Indo-Australian, and Antarctica
6. going in different directions; different from each other; departing from conversation, deviant
7. A German scientist
8. the edges of tectonic plates.
9. One plate going under another plate
11. A major belt of volcanoes that rims the
13. A plate boundary where two plates move toward each other.
14. Deep valley in the ocean floor that forms along a subduction zone
16. Thin plates that form the ocean floor; more dense than continental plates.