Tectonic Crossword Puzzle by Kenneth Tom

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Across
  1. 2. When two plates slide past each other.
  2. 8. Proposed the theory4 seafloor spreading hypothesis.
  3. 9. Proposed an important earth theory in 1912.
  4. 10. The result of differential heating when warm materials rise and cooler materials sink.
  5. 13. Dense and young plates.
  6. 16. The gradual movement of the continents across the earth's surface through geological time.
  7. 17. The formation of new areas of oceanic crust, which occurs through the upwelling of magma at midocean ridges and its subsequent outward movement on either side.
  8. 18. The outermost solid shell of a rocky planet.
Down
  1. 1. A scientific theory describing the large-scale motion of the plates making up Earth's lithosphere.
  2. 3. Consists of the crust and upper mantle.
  3. 4. The length that plates travel a year.
  4. 5. When enough magma builds up in the magma chamber.
  5. 6. An action where two tectonic plates move away from each other.
  6. 7. The action or process in plate tectonics of the edge of one crustal plate descending below the edge of another.
  7. 11. The shaking of the surface from the Earth.
  8. 12. Older and drier plates.
  9. 14. An area on Earth where two or more lithospheric plates collide.
  10. 15. Wark with or form into narrow raised bands.