Earth's Layers

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Across
  1. 3. The primary rock that makes up the ocean crust
  2. 5. A method of heat transfer through a fluid
  3. 7. The shape of the inner core
  4. 8. Movement in the outer core creates this field
  5. 10. Crust that dense, thin, and young
  6. 12. The reason a planet develops interior layers
  7. 13. The primary rock that makes up the continental crust
  8. 17. The outer core exists in this state of matter
  9. 21. thinnest type of crust
  10. 22. A term for the crust and the rigid mantle
  11. 23. The deepest layer we have dug into
Down
  1. 1. This increases as you travel deeper into the Earth
  2. 2. The layer of gases that surrounds the Earth
  3. 4. The center of Earth is as hot as the surface of this object
  4. 6. Earth's layers were discovered by studying these
  5. 9. The force that pulls towards Earth's core
  6. 11. Crust that is less dense, thick, and old
  7. 14. This part of the mantle is located above the asthenosphere
  8. 15. Oceans, rivers, and seas are part of this
  9. 16. This layer acts like hot, plastic putty
  10. 18. core The densest Earth later
  11. 19. The composition of the inner core
  12. 20. The asthenosphere is part of which layer