Across
- 1. The oldest rocks of the plate are about 50 million years old
- 4. The biggest plate
- 7. Landmass made up of most or all of Earth's land
- 8. Violent shaking of the ground
- 10. Layer inside a planetary body bounded
- 14. The third biggest plate
- 17. Roughly rhomboid, extending between 50°S 70°W and 63°S 20°W
- 18. Where two plates move toward from each other
- 19. lies beneath the Philippine Sea, to the east of the Philippines
- 20. The denser, weaker layer beneath the lithospheric mantle
Down
- 2. Includes much of the continent of Africa, and adjacent oceanic
- 3. Published two articles about a concept called continental drift
- 5. Mostly oceanic tectonic plate underlying Central America
- 6. Outermost solid shell of a rocky planet
- 9. The earth's crust and the large-scale processes
- 11. Minor tectonic plate in the Northern and Eastern Hemispheres
- 12. Vent through which lava, rock fragments
- 13. The solid, outer part of Earth
- 15. Earth's fifth-largest tectonic plate
- 16. Where two plates move away from each other