Plate Tectonics

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Across
  1. 3. Means "all land" and refers to the idea that the continents were once one large land mass
  2. 5. boundary the boundary between tectonic plates that are colliding
  3. 6. a break in the Earth's crust which rocks move
  4. 7. fit Wegener's evidence that stated the continents today use to fit together like a puzzle
  5. 10. valley a deep valley that forms where two plates move apart
  6. 11. boundary the boundary between two tectonic plates that are moving away from each other
  7. 15. plate a section of the lithosphere that slowly moves over the asthenosphere, carrying pieces of continental and oceanic crust
  8. 16. spot areas of volcanic activities that result from plumes of hot solid material that have risen from deep inside Earth's mantle
  9. 17. striations Wegener's evidence that states glacier scrapes are found in warm climates today
  10. 18. Hess Princeton geologist who proposed seafloor spreading in 1962 as the reason for Pangea's break-up
Down
  1. 1. spreading the process by which molten material adds new oceanic crust to the ocean floor
  2. 2. the process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary
  3. 3. tectonics Earth's plates are in slow, constant motion, driven by convection currents in the mantle
  4. 4. ocean trench a deep valley along the ocean floor beneath which oceanic crust slowly sinks towards the mantle
  5. 8. boundary the boundary between tectonic plates that are sliding past each other horizontally
  6. 9. Wegener A German meteorologist who proposed a hypothesis in 1915 that stated that all the continents were once joined together in a single land mass in the past and they have moved apart since.
  7. 12. and landforms Wegner's evidence that the Appalachian Mountain range matches well with those on the British Isles as well as other places
  8. 13. ridge an undersea mountain chain where new ocean floor is produced; a divergent plate boundary
  9. 14. evidence Wegener's evidence that stated plants and animal fossils are found today in places they could not exist today due to climate or distance from origin