Plate Tectonics Crossword

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Across
  1. 1. The border between two plates
  2. 5. The earth is made up of 13-20 ______
  3. 6. Made up of crust and a little bit of the upper mantle
  4. 10. This may occur as a result of two plates sliding against each other
  5. 13. Boundary where two plates move towards each other
  6. 16. The continent that is believed to have once fit into South America
  7. 17. The creator of the Continental Drift theory's first name
  8. 18. ________ spreading.The process that forms new ocean floor and oceanic spreading.
  9. 19. When a plate slides under another
  10. 20. Boundary where two plates slide against each other
Down
  1. 2. Boundary where two plates move away from each other
  2. 3. A crack in a plate
  3. 4. The outermost shell of the Earth
  4. 7. Part of the plate where earthquakes occur
  5. 8. The super-continent in the Continental Drift theory
  6. 9. The layer of Earth between the core and the crust.
  7. 11. This is formed by one plate sliding under the other
  8. 12. A type of evidence that points to the theory being true
  9. 14. Most plates are made up of continents and some _____
  10. 15. Alfred Wagner suggested that continents were ________