Tectonic Plates Crossword

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Across
  1. 2. A Neoproterozoic supercontinent that was assembled 1.3 - 0.9 billion years ago and broke up 750 - 600 million years ago.
  2. 3. A small area or region with a relatively hot temperature in comparison to its surroundings.
  3. 7. Tectonics A scientific theory that describes the large-scale motion of Earth's lithosphere.
  4. 8. Rim The countries and regions bordering the Pacific Ocean, especially the small nations of eastern Asia.
  5. 9. An actively deforming region where two or more tectonic plates move toward another and collide.
  6. 12. A mild tremor preceding the violent shaking movement of an earthquake.
  7. 14. Rifting The belt or zone of the continental lithosphere where the extensional deformation is occurring.
  8. 16. An extended break in a body of rock, marked by the relative displacement and discontinuity of strata on either side of a particular surface.
  9. 18. Activity Relating to or occurring within the interior of a tectonic plate.
  10. 19. Boundaries An area on the margins of tectonic plates where seismic, volcanic, and tectonic activity takes place as a consequence of the relative motion of the plates.
  11. 20. A supercontinent comprising all the continental crust of the earth, postulated to have existed in late Paleozoic and Mesozoic times before it broke into Gondwana and Laurasia.
  12. 21. Currents A current in a fluid that results from convection.
Down
  1. 1. A linear feature that exists between tectonics plates that are moving away from each other.
  2. 4. The sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.
  3. 5. Upper layer of the earth's mantle, below the lithosphere, in which there is relatively low resistance to plastic flow and convection is thought to occur.
  4. 6. Faults A strike-slip fault occurring at the boundary between two plates of the earth's crust.
  5. 10. The point on the earth's surface vertically above the focus of an earthquake.
  6. 11. A very large igneous intrusion extending deep in the earth's crust.
  7. 13. Rigid outer part of the earth, consisting of the crust and upper mantle.
  8. 15. The region of the earth's interior between the crust and the core, believed to consist of hot, dense silicate rocks.
  9. 17. Spreading The formation of new areas of oceanic crust, which occurs through the upwelling of magma at mid ocean ridges and its subsequent outward movement on either side.
  10. 21. Form into a hard outer layer: