Life's Rocky Start

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Across
  1. 4. Father of evolutionary biology
  2. 5. Rock that fell from space
  3. 7. Fossilised ancient microbial structures
  4. 8. Clay surfaces can act as __________ to make complex organic compounds
  5. 12. One of the oldest places on Earth
  6. 13. Rock that forms the foundation of continents
  7. 16. Building blocks of life that can be made from non-organic materials
  8. 17. __________ is needed to split molecules
  9. 19. Ancient city in Morocco
  10. 20. Gas that was rare in the early atmosphere
Down
  1. 1. Earth's first rocks
  2. 2. Yosemite is known for it's biological __________
  3. 3. Biological process that turned Earth red through iron oxidation
  4. 6. Life around hydrothermal vents thrives on __________ energy
  5. 9. Creature that thrived during the Cambrian explosion of biological
  6. 10. Carbon dioxide is a __________ gas
  7. 11. Scientist who performed an early earth experiment
  8. 14. Molecule that is essential for all life
  9. 15. Measurement in years of Earth's age
  10. 18. One of the longest-lasting materials in nature