Plate Techonics

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Across
  1. 3. A major belt of volcanoes that rims the Pacific Ocean.
  2. 10. A plate boundary where two plates move away from each other.
  3. 12. The molten mixture of rock-forming substances, gasses, and water from the mantle.
  4. 15. The hypotheies that the continents slowly move arcoss Eaths surface.
  5. 16. The process by which molten material adds new oceanic crust to the ocean floor.
  6. 17. A section of the lithosphere that slowly moves over the astenosphere, carrying pieces of continental and oceanic crust.
  7. 18. The process by which oceanic crust sinks beneath a deepocean trench and back intp the mantle at a conveergent plate boundary.
  8. 20. A deep valley that forms where two plates move apart.
  9. 22. A plate boundary where two plates move past each other in opposite directions.
  10. 23. The transfer of thermal energy by the movement of a fluid.
Down
  1. 1. An undersea mountain chain where new oean floor is produced; a divergent plate boundary under th ocean.
  2. 2. A deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle.
  3. 4. The prreserved remains or traces of an organism that lives in the past.
  4. 5. The movement of a fluid, caused by differences in temperature, that transfers heat from one part of the fluid to another.
  5. 6. A plate boundary where two plates move toward each other.
  6. 7. A weak spot in the crust where magma has come to the surface.
  7. 8. A string of volcanoes that form as the result of subduction of one oceanic plate beneath a second oceanic plate.
  8. 9. A break in Eaths crust along which rocks move.
  9. 11. The transfer of energy by electromagnetic waves.
  10. 13. An area where magma from deep within the mantle melts through the crust above it.
  11. 14. The measurement of how much mass of a substance is containce in a given volume.
  12. 17. The theory that pieces of Earths lithosphere are in constant motion, driven by convection currents in the mantle.
  13. 19. The name of the single landmass that began to break apart 200 millon years ago and gave rise to today's continents.
  14. 21. Stress that squeezes rock until it folds or breaks.