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