Across
- 1. undersea mountain range formed at diverging oceanic plates
- 3. a current caused by the rising of heated fluid and sinking of cooled fluid
- 4. an ancient landmass which separated into present-day continents
- 7. type of crust that is thinner and more dense
- 8. A trace of an ancient organism that has been preserved in rock.
- 10. Magma that reaches Earth's surface
- 15. extremely deep areas in the ocean that are created by a subducting plate
- 16. well-tested explanation that unifies a broad range of observations
- 17. The shaking that results from the movement of rock beneath Earth's surface.
- 18. areas that are below sea level
- 20. a supercontinent that existed 300–200 million years ago, made up of all the continents on Earth
- 21. a chain of islands formed over a hotspot
- 23. A break in the earth's crust
- 24. a branch of geology concerned with the structure of the crust of a planet and the formation of folds and faults in it
- 26. a supervolcano formed over a hotspot in the western United States
- 27. scientist that proposed Earth's continents were once joined together in a single land mass
- 29. One plate going under another plate
- 30. a volcanically active area of Earth's surface far from a tectonic plate boundary
- 34. theory that Earth's continents move or drift relative to each other over geologic time
- 35. this island in the chain will be closest to the hotspot that formed it
- 37. vibrations that travel through Earth carrying the energy released during an earthquake
- 38. Sections of the Earth's crust that move due to convection currents in the mantle
Down
- 2. type of crust that is thicker and less dense
- 5. faults and volcanoes are most often found here
- 6. formed where oceanic and continental crust converge
- 7. this island in the chain will be furthest from the hotspot that formed it
- 9. a geologic process that creates new ocean floor at mid-ocean ridges
- 11. Massive volcano that can produce unbelievably enormous, but rare, eruptions.
- 12. how often supervolcanoes erupt
- 13. A plate boundary where two plates move toward each other.
- 14. Molten rock beneath the earth's surface
- 19. A plate boundary where two plates move away from each other.
- 22. formed at converging continental plates
- 23. describes the location of hotspots in the mantle
- 25. The boundary between tectonic plates that are sliding past each other horizontally
- 28. a principle that states that younger rocks lie above older rocks if the layers have not been disturbed
- 31. formed from diverging continental plates
- 32. A weak spot in the crust where magma has come to the surface
- 33. A scale that rates an earthquake's magnitude based on the size of its seismic waves.
- 36. convection currents here cause plate tectonics