Geology Intro Puzzle Part I

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Across
  1. 2. inner two layers of earth
  2. 4. molten rock underground
  3. 8. layer between the crust and mantle
  4. 9. boundary where plates come together
  5. 10. crust and outermost mantle
  6. 11. evidence of past life
  7. 13. living layer of the earth
Down
  1. 1. boundary where two layers move apart
  2. 3. thickest layer of the earth
  3. 5. gases that surround the earth
  4. 6. idea that all landform changes are abrupt
  5. 7. the study of the physical and historical earth
  6. 12. outermost layer of the earth
  7. 14. liquid layer of earth