Across
- 3. any trace of an ancient organism that has been preserved in a rock
- 6. The flow that transfers heat within fluid
- 8. when magma reaches the surface
- 9. mid-ocean ridges continually add new material to the ocean floor
- 12. Wegener's idea that the continents slowly moved over earth's surface
- 16. The resulting volcanoes sometimes create a string of islands
- 17. form long chains of mountains that rise up from the ocean floor
- 18. boundary plates move apart
- 20. boundary plates come together
- 21. Heat transfer between materials that are touching
- 22. wegener called supercontinent
Down
- 1. the ocean floor sinks beneath a deep-ocean trench and back into the mantle
- 2. an area where material from deep within earths mantle
- 4. one major belt of volcanoes
- 5. broken into pieces separated by cracks
- 7. boundary plates slide past eachothere
- 10. measure of how much mass there is in a given volume
- 11. a mountain that forms in earth's crust
- 13. the transfer of energy that is carried in rays like light
- 14. is a molted mixture of rock-forming substances gases and water from the mantle
- 15. Heat transfer by the movement of a fluid
- 19. the ocean floor plunges into deep underwater canyons