D Atkinson

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Across
  1. 3. The inner most layer of the Earth
  2. 4. Rocks formed from sediment
  3. 6. Vibrations in the Earth's crust and mantle
  4. 12. When continental tectonic plates collide
  5. 14. The process of sorting different materials based upon density.
  6. 16. 1000 meters
  7. 19. When tectonic plates push each other apart
  8. 20. Magnetic sphere surrounding the Earth
  9. 21. When continental crust and oceanic crust collide and the denser plate subducts
Down
  1. 1. The theory for which all contemporary understanding of tectonic plates is based
  2. 2. To bend
  3. 5. The thickest layer of the earth under the crust
  4. 6. A device that measures seismic activity
  5. 7. wind Ions from the sun
  6. 8. The rise of warmer material and the fall of cooler material
  7. 9. The outer most and thinnest layer of the Earth
  8. 10. Rock formed by heat and pressure.
  9. 11. rock formed via volcanic activity
  10. 13. zone of charged particles
  11. 15. A weak area in Earth's crust can form islands
  12. 17. Study of the Earth's crust
  13. 18. When two tectonic plates move past each other horizontally