Plate Tectonics Terms

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