Plate Tectonics

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Across
  1. 4. boundary / When 2 tectonic plates move away from one another
  2. 5. boundary / When 2 tectonic plates moving past one another in opposite direction.
  3. 7. / the layer that is semi-solid and immediately below the lithosphere.
  4. 9. tectonics / The lithosphere is divided into large moving pieces
  5. 10. spreading / process of new seafloor forming.
Down
  1. 1. / a system of ideas that explains many related observations about the natural world.
  2. 2. / the outermost physical layer of the earth
  3. 3. drift / the hypothesis that today's continents were once apart of a single land mass.
  4. 6. boundary / when tectonic plates move toward each other and collide.
  5. 8. / The process of a less dense plate sinking below a more dense plate.