Tectonic plates

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Across
  1. 3. the boundary between two tectonic plates that are moving together
  2. 7. the transfer of thermal energy by the movement of molecules in air or liquid form one place to another
  3. 8. the boundary between two tectonic plates that are moving apart
  4. 10. the action of forming or process of being formed.
  5. 11. lithosphere: the outer layer of the earth
  6. 13. a theory that the middle of the ocean is spreading apart forming new oceanic crust
  7. 15. any long narrow steep-sided depression in the ocean bottom
  8. 17. the relatively thin part of the earth's crust which underlies the ocean basins.
  9. 19. German meteorologist and geophysicist who formulated the first complete statement of the continental drift hypothesis
  10. 21. the current or flow of air or liquid that results from the transfer of thermal energy through convection
  11. 22. hot fluid or semi-fluid material below or within the earth's crust from which lava and other igneous rock is formed on cooling.
  12. 25. a deep valley that forms as a result of tectonic plates moving apart on land
  13. 26. a theory explaining the structure of the earth's crust and many associated phenomena as resulting from the interaction of rigid lithospheric plates which move slowly over the underlying mantle.
  14. 27. a hypothetical supercontinent that included all current land masses believed to have been in existence before the continents broke apart during the Triassic and Jurassic Periods.
  15. 28. a fracture in rock where the tectonic plates have moved
  16. 29. any of the world's main continuous expanses of land
  17. 30. to continent collision, when two continental plates collide
  18. 32. hot molten or semi-fluid rock erupted from a volcano or fissure
  19. 33. core, The solid material found in the centre of some planets at extremely high temperature and pressure distinct from the liquid outer core.
  20. 34. the solid mineral material forming part of the surface of the earth and other similar planets
  21. 35. a mountain or hill typically conical having a crater or vent through which lava rock fragments hot vapour and gas are or have been erupted from the earth's crust.
  22. 36. collision, when two oceanic plates collide
  23. 37. the boundary between two tectonic plates that are sliding past each other
Down
  1. 1. the movement of one tectonic plate under another tectonic plates
  2. 2. a geographical area of high volcanic and seismic activity around the edges of the Pacific Ocean
  3. 4. the centre of the earth
  4. 5. number that characterizes the relative size of an earthquake.
  5. 6. a series of underwater mountains that form as a result of tectonic plates moving apart and allowing magma to rise to the surface
  6. 9. a sudden violent shaking of the ground typically causing great destruction as a result of movements within the earth's crust or volcanic action.
  7. 12. a device that measures the movement of the earth
  8. 14. core, The hot liquid material found near the centre of some planets, distinct from the solid inner core.
  9. 16. drift, the continual movement of the continents over time
  10. 18. each of several large land masses thought to have divided to form the present continents in the geological past.
  11. 20. a deep ditch under the ocean along a tectonic plate boundary
  12. 23. part of the earth between the core and the the crust
  13. 24. a large layer of solid rock that covers part of the surface of the earth: movement of tectonic plates can cause earthquakes
  14. 26. an area of fairly level high ground.
  15. 29. shelf, underwater cliffs between the beach and the ocean
  16. 31. a series of large waves that result from an underwater earthquake