Development of a Theory

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Across
  1. 1. not flexible
  2. 3. a system that uses reflected sound waves to detect and locate objects underwater
  3. 5. A geologist and an oceanographer who mapped the ocean floor and proved plate
  4. 7. magma that erupts onto Earth's surface
  5. 9. long narrow mountain range on the ocean floor; formed by magma at divergent
  6. 10. boundaries.
  7. 12. each other.
  8. 13. rock is near Ridges.
  9. 15. a system that accurately determines the precise position of something on Earth
  10. 16. A description of surface features of land.
Down
  1. 2. Map made of the ages of the sea floor. Indicated oldest rock is near continents,
  2. 3. the process by which new oceanic crust forms along a mid-ocean ridge and older
  3. 4. theory that Earth's surface is broken into large, rigid pieces that move with respect
  4. 5. molten rock stored below earth's surface
  5. 6. The geologist that discovered sea floor spreading
  6. 8. crust moves away from the ridge
  7. 11. a convergent plate boundary.
  8. 14. trench a deep, underwater trough created by one plate subducting under another plate