Across
- 2. layer of rock on earth's outer skin
- 6. coarse grains with a light color
- 7. Boundary plates come together
- 9. a group of crust and the uppermost mantle in a single layer
- 11. dark, fine, rock
- 13. Boundary plates move apart
- 15. a supercontinent
- 16. Floor Spreading mid ocean ridges add new material all the time and it spreads
- 18. an ancient organism that has been preserved in rock
- 20. a layer of hot rock
Down
- 1. Core molten metal around the inner core
- 3. Core dense ball of hard metal
- 4. the upper layer of the earth's mantle, below the lithosphere
- 5. Drift movement of the continents across the earth's surface
- 8. a break in earths crust where rocks go past each other
- 10. locating objects underwater and measuring the water's depth by sound
- 12. Ocean Ridge mountain ranges
- 14. Boundary plates slip past each other
- 17. Valley pieces of earths crust come together to form a deep valley
- 19. Ocean Trench ocean floor goes into the floor into underwater canyons