Theory of plate tectonics

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Across
  1. 3. The gradual movement of continents across the Earth's surface through geological time.
  2. 5. A large supercontinent that existed millions of years ago, made up of all the Earth's landmasses.
  3. 6. The scientist who proposed the theory of continental drift.
Down
  1. 1. The process by which new oceanic crust is created at divergent boundaries, pushing older crust away.
  2. 2. A scientific theory that explains the movement of Earth's plates and the interactions between them.
  3. 4. The movement of molten rock in the Earth's mantle that causes tectonic plates to move.