History of Life

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Across
  1. 2. Swan neck
  2. 6. Regular/ nonradioactive carbon
  3. 7. Type of dating using radioactive elements
  4. 9. Longest unit of geologic time
  5. 10. Half-life of carbon 14 (spell out numbers)
  6. 12. Radioactive carbon
  7. 13. one of the building blocks of life
  8. 15. Movement of large areas of land on the earth
  9. 19. Made amino acids in their experiment
  10. 20. The first life was probably this
  11. 21. Possibly the first photosynthesis
  12. 22. element with highest % in atmosphere/today and early earth
Down
  1. 1. life from nonliving
  2. 2. Studies ancient life
  3. 3. Like photosynthesis but no light needed
  4. 4. Maggots/meat
  5. 5. Life only comes from life
  6. 8. Chapter/history of this
  7. 11. Chemical evolution
  8. 14. Rate of decay
  9. 16. Margulis theory
  10. 17. boiled broth/sealed/no bacteria
  11. 18. Developed carbon dating