Plate Tectonics Terms

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