Continental drift theory

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Across
  1. 3. - A deep valley formed as tectonic plates move apart, often found along mid-ocean ridges.
  2. 4. - Remains or impressions of prehistoric organisms found on different continents, supporting the theory.
  3. 8. - Circular movements of molten rock within the Earth's mantle that drive plate movement.
  4. 11. - A supercontinent that existed millions of years ago, where all Earth's landmasses were joined together.
  5. 12. - Changes in Earth's magnetic field, recorded in oceanic crust, that support plate movement.
  6. 14. - The semi-fluid layer beneath the lithosphere on which tectonic plates move.
  7. 15. - Large sections of Earth's crust that move over the mantle.
Down
  1. 1. - A mountain range in the Atlantic Ocean where seafloor spreading occurs.
  2. 2. - The process by which one tectonic plate is forced under another at convergent boundaries.
  3. 5. - The process by which new oceanic crust forms as magma rises at mid-ocean ridges.
  4. 6. - The rigid outer part of the Earth, consisting of the crust and uppe mantle.
  5. 7. - The southern part of the supercontinent Pangaea.
  6. 9. - The theory that continents have moved over geological time to their current locations.
  7. 10. - The scientist who proposed the theory of continental drift.
  8. 13. - The northern part of Pangaea that eventually split into continents.