Science Crossword

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Across
  1. 3. Rock that forms earth’s outer skin
  2. 4. Breaks in earth’s crust
  3. 7. Item from the past that is preserved in rock
  4. 8. Uppermost part of the mantle
  5. 10. A supercontinent that existed 400 million years ago
  6. 11. Where 2 plates meet and spread apart
  7. 12. Chain of underwater mountains
  8. 15. Deep underwater trench
  9. 17. Process that adds material to the ocean floor
  10. 18. Pieces of earth’s lithosphere
  11. 19. A process in which the ocean floor sinks beneath a deep ocean trench
Down
  1. 1. Boundary where 2 plates slide past each other
  2. 2. Theory that plates are slowly moving overtime
  3. 3. Theory that continents are slowly moving overtime
  4. 5. Where 2 plates meet and collide
  5. 6. Layer of hot rock underneath the crust
  6. 9. Tool that uses sound waves to detect objects underwater
  7. 13. Place where earth’s crust diverge on land
  8. 14. Scientist that proposed theory of continental drift
  9. 16. Fault lines collide and produce seismic activity