Continental Drift

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Across
  1. 2. Earth’s hottest central layer, producing heat that drives mantle movement.
  2. 4. Remains of ancient plants or animals used as evidence to show continents were once joined.
  3. 5. German scientist (1915) who first suggested the theory of continental drift.
  4. 7. Layer of hot, semi-solid rock beneath the crust where convection currents occur.
  5. 10. Wegener’s idea that continents were once joined and slowly moved apart.
  6. 11. Movement in Earth’s mantle caused by uneven heating, likely driving plate movement.
Down
  1. 1. Earth’s thin, rocky outer shell made of tectonic plates.
  2. 3. Canadian scientist who helped develop modern plate tectonics in the 1960s.
  3. 6. Clues Wegener used, including fossils, mountain ranges, glacial deposits, and continental fit.
  4. 7. Ranges like the Appalachians and Caledonians, evidence of continents colliding.
  5. 8. Supercontinent that existed about 300 million years ago, meaning “all land.”
  6. 9. Tectonics Modern theory explaining how Earth’s crustal plates move and interact.