Module 13: Plate Tectonics Vocabulary

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Across
  1. 3. Earth's rigid outer shell
  2. 5. forms large landmasses, older than oceanic crust
  3. 6. huge pieces of crust and rigid upper mantle that fit together at their edges to cover Earth's surface
  4. 10. the transfer of thermal energy by the movement of heated material from one place to another, cooled material sinks and warm material rises
  5. 11. the theory that explains how new oceanic crust forms at ocean ridges, slowly moves away from ocean ridges, and is destroyed in deep sea trenches
  6. 13. a region where two tectonic plates are moving apart
Down
  1. 1. a hypothesis that Earth's continents had once been joined as a single landmass that broke apart and sent the continents adrift
  2. 2. beneath the ocean floor, less than 200 million years old
  3. 4. a region where two tectonic plates are moving toward each other
  4. 7. The layer below the mantle with temperatures as high as 7000 Celciuc
  5. 8. The layer below the crust with temperatures from 100 to 4000 Celcius
  6. 9. the name for the supercontinent meaning "all the earth" in Greek
  7. 12. when two plates collide and the denser plate eventually descends below the less-dense plate
  8. 14. a region where two plates slide horizontally past each other