Across
- 2. Scientific law that states fossils located in deeper sediment layers are older than ones deposited in layers closer to the surface (3 words)
- 5. The study of ancient life
- 8. The formation of fossils as stone replaces decaying tissues
- 10. A branching tree diagram that shows ancestral relationships among organisms
Down
- 1. The mineralized remains of organisms, showing how long-dead organisms lived and how their bodies were structured
- 3. The natural process of result of being slowly broken down or decomposed, chiefly by bacteria and fungi
- 4. The permanent disappearance of a species from Earth
- 6. The study of the structures of organisms and their parts
- 7. The quality or state of having many different forms, types, ideas, etc.
- 9. To change the frequencies of alleles in a population over time