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