Investigating Plate Tectonics

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Across
  1. 4. A vibration in the ground that results from the movement along breaks in Earth’s lithosphere.
  2. 9. A theory stating that Earth’s surface is divided into large plates of rigid rocks that move with respect to each other. (CAUSE)
  3. 10. The preserved remains or evidence of past living organisms
  4. 13. The boundary between two plates that move away from each other.
  5. 15. The process by which new oceanic crust forms along a mid-ocean ridge and older oceanic crust moves away from the ridge
  6. 17. The principle that in undisturbed rock layers, the oldest rocks are on the bottom.
  7. 18. A mountain range in the middle of an ocean
Down
  1. 1. A hypothesis that suggests continents are in constant motion on the surface of Earth. (EFFECT)
  2. 2. A column of mantle that is hotter than the surrounding material.
  3. 3. The process in which a denser plate sinks below a more buoyant plate
  4. 5. The plastic layer within the mantle
  5. 6. The rigid outermost layer of Earth that includes the uppermost mantle and crust
  6. 7. The process by which Earth’s magnetic field reverses direction
  7. 8. A location where two plates slide past each other.
  8. 11. The land surface under the ocean
  9. 12. A location where two plates collide
  10. 14. A vent in Earth’s crust through which molten rock flows
  11. 16. A volcano that has had an eruption of more than 1000 cubic kilometers of material.