Crossword Puzzle

Edit Answers
12345678910111213141516171819
Across
  1. 1. Ring of Fire a major area in the Pacific Ocean where a large number of earthquakes and volcanic eruptions occur.
  2. 4. a mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapor, and gas are being or have been erupted from the earth's crust.
  3. 7. drift the gradual movement of the continents across the earth's surface through geological time.
  4. 10. movement caused within a fluid/solid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity.
  5. 12. the study of the record of the Earth's magnetic field in rocks, sediment, or archaeological materials.
  6. 13. a fracture in Earth's surface that widens over time.
  7. 14. tectonics theory explaining the structure of the earth's crust and many associated phenomena.
  8. 16. rigid outer part of the earth, consisting of the crust and upper mantle.
  9. 17. crust the uppermost layer of the oceanic portion of a tectonic plate.
  10. 18. boundary two tectonic plates that are moving away from each other.
  11. 19. 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.
Down
  1. 2. Arc a curved chain of volcanic islands located at a tectonic plate margin.
  2. 3. boundary two (or more) tectonic plates or fragments of the lithosphere move toward one another and collide.
  3. 5. Zone a geological process that takes place at convergent boundaries of tectonic plates where one plate moves under another and is forced or sinks due to gravity into the mantle.
  4. 6. crust the relatively thick part of the earth's crust that forms the large landmasses.
  5. 8. boundary a type of fault whose relative motion is horizontal.
  6. 9. the upper layer of the earth's mantle, below the lithosphere.
  7. 11. a sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust or volcanic action.
  8. 15. ridges an underwater mountain range, formed by plate tectonics.