Topic 4.1 / 4.2 Plate Tectonics

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Across
  1. 1. -A theory that states that the lithosphere the crust and upper mantle
  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. 5. -A valley that forms at a divergent boundary on land.
  4. 9. -The process that creates new sea floor as plates move away from each other at the mid-ocean ridges
  5. 10. -Last name of a German scientist who proposed the theory of continental drift
Down
  1. 1. - A supercontinent containing all of Earth's land that existed about 225 million years ago.
  2. 3. -A plate boundary where two plates move past each other in opposite directions.
  3. 4. -An undersea mountain chain where new ocean floor is produced; a divergent plate boundary under the ocean.
  4. 6. - The preserved remains or traces of an organism that lived in the past.
  5. 7. -A tectonic plate boundary where two plates collide, come together, or crash into each other.
  6. 8. drift -The hypothesis that states that the continents once formed a single landmass, broke up, and drifted to their present locations