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