Earth's layers, plate tectonics, boundaries, and structures

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Across
  1. 2. This layer of the Earth is the thinnest
  2. 5. This layer of the Earth is a solid
  3. 7. Convection currents are located in this layer
  4. 8. This layer of the Earth is liquid
  5. 9. A fracture or break in the Earths Crust
  6. 12. Coldest layer of the Earth
  7. 13. This boundary has three types
  8. 16. These have been moving since 3-4 billion years ago
  9. 18. These are more detailed layers of the Earth
  10. 19. This happens when dense, old oceanic crust moves below continental crust
Down
  1. 1. This theory was made by Alfred Wegner
  2. 3. Plates in this boundary move apart
  3. 4. This is the hottest layer of the Earth
  4. 6. This forms new oceanic crust
  5. 10. This theory was also made by Alfred Wegner
  6. 11. The _____ of the Earth consists of many layers
  7. 14. Tectonic Plates make up this layer
  8. 15. The layer below the crust
  9. 17. _______ led to the inner core being a solid
  10. 20. This boundary is conservative