Continental Drift Theory

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Across
  1. 1. A supercontinent that existed about 335 million years ago.
  2. 2. Tectonics: The theory that describes the movement of Earth's lithospheric plates.
  3. 6. Evidence: Similar glacial deposits and striations on continents.
  4. 7. Currents: The driving force behind plate movement due to heat in Earth's mantle.
  5. 10. Plates: Large, rigid sections of the Earth's lithosphere that move.
  6. 11. Spreading: The process by which new oceanic crust is formed at mid-ocean ridges.
  7. 12. of the Continents: The way the coastlines of continents seem to fit together.
  8. 13. Ridge: An underwater mountain range that marks a tectonic plate boundary.
Down
  1. 1. Evidence: Evidence of past climates on continents that were once connected.
  2. 3. Ultima: A potential future supercontinent based on current plate motion.
  3. 4. Wegener: The scientist who proposed the continental drift theory in the early 20th century.
  4. 5. Areas of concentrated volcanic activity not associated with plate boundaries.
  5. 6. Features: Matching geological features on opposite sides of the Atlantic Ocean.
  6. 8. Drift: The hypothesis that continents have moved over geological time.
  7. 9. Evidence: Fossils of similar organisms found on continents that are now separated.