Continental Drift & Tectonic Plates

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Across
  1. 1. boundary A boundary along which 2 tectonic plates push together, characterized either by subduction or a continental collision.
  2. 2. boundary A boundary along which 2 tectonic plates move apart, characterized by either a mid-ocean ridge or a continental rift valley.
  3. 4. drift A hypothesis that Earth's continents move on Earth's surface.
  4. 7. boundary A boundary along which 2 tectonic plates scrape past each other, and crust is neither formed nor destroyed.
  5. 9. A hypothetical supercontinent that included all of the landmass on Earth.
  6. 10. A thin layer of rock above a planet's mantle, including all dry land and ocean basins.
Down
  1. 1. The transfer of energy from place to place by the motion of heated gas or liquid; in Earth's mantle.
  2. 3. ridge A long line of sea-floor mountains where now ocean crust is formed by volcanic activity along a divergent boundary.
  3. 5. plates Large moving pieces into which Earth's lithosphere is broken and which commonly carries both oceanic and continental crust.
  4. 6. The layer of Earth made up of the crust and the ridge rock of the upper mantle.
  5. 8. The layer of rock between Earth's outer core and crust. It is also the thickest layer.