Plate tectonics
Across
- 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
Down
- 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.