Across
- 3. Is a large landmass
- 8. Part of the mantle that is less rigid than the rock above
- 9. Any trace of an ancient organism
- 11. Mountain ranges that ran along the middle of some ocean floors
- 12. made of mostlty iron and nickel
- 14. Deep underwater canyons
- 16. Theory that plates are in slow, constant motion
- 19. Plates move apart, or diverge
- 21. Plates slip past each other
- 22. Ocean floor sinks beneath a deep ocean trench and back to the mantle
- 23. Layer of molten metal materials
- 24. single landmass, about 300 million years ago
Down
- 1. Dense ball of solid metal
- 2. sections of Earth separated by cracks
- 4. Breaks in Earths crust
- 5. The layer of rock that forms Earth's outer skin
- 6. Plates come together,or converge
- 7. Part of the mantle that is strong hard and rigid
- 10. Landmass slowly moved over Earth's surface
- 13. Continually adding new materials to the ocean floor
- 15. Rock usually with light colors and has coarse grains
- 17. Part of the mantle that is hot but more rigid
- 18. Dark,fine-grained rock
- 20. Results from a force pressing on an area