Week 15 Optional Enrichment

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Across
  1. 2. a large, unbroken area of land
  2. 3. the remains, traces, or imprint of ancient living things preserved in rock
  3. 8. energy waves traveling out from an earthquake
  4. 9. ground vibrations caused by Earth's moving crus
  5. 12. a time when Earth was very cold and large areas were covered by glaciers
  6. 13. Alfred ___ proposed continental drift in 1915
  7. 14. type of boundary between two plates sliding past each other
  8. 15. type of boundary between two plates moving away from each other
Down
  1. 1. type of boundary between two plates sliding past each other
  2. 4. a single landmass that includes two or more continents
  3. 5. a spot in Earth's mantle where hot magma rises to the surface
  4. 6. a theory stating that the continents drifted apart
  5. 7. a large, slowly moving body of snow and ice
  6. 10. type of boundary between two colliding plates
  7. 11. an ancient supercontinent containing all of Earth's landmass