D Atkinson

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