Unit 7 - Investigating Plate Tectonics

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Across
  1. 2. huge, violent eruptions that produce greater than 1,000 cubic kilometers of Earth material
  2. 3. occurs where two plates slide past each other
  3. 4. a low area of the Earth's surface in which an ocean lies
  4. 7. occurs where two plates move away from each other
  5. 8. the result of two tectonic plates sliding past each other
  6. 9. huge piece of crust that slowly moves on the upper, ductile part of the mantle
  7. 12. the theory that continents were once connected but have drifted apart
  8. 13. the remains of organisms and rock layers that show when and where there was once life
  9. 14. occurs where two plates move toward each other
  10. 15. the law that says that younger rock layers sit on top of older rock layers
Down
  1. 1. major event when continental plates converge, resulting in mountain chains
  2. 4. deep and narrow low area in the seafloor where plates have subducted
  3. 5. the theory that the crust is divided into large pieces that slowly move on top of the mantle
  4. 6. the process in which a denser plate is pushed downward beneath a less dense plate when plates converge
  5. 10. found in the ocean when magma escapes from the crust
  6. 11. event in which molten rock spews out from the mantle to the surface of earth as ash, lava, and gases