Across
- 4. An environment that a species can survive in
- 5. Items above are younger than items beneath
- 8. History of life documented by fossils
- 9. Differences within the same species
- 10. Lineage traced back to ancestors
- 11. Diagram showing how items are related evolutionarily
- 12. Made fossil discoveries of organisms with backbones moving from water to land
- 15. Occurs randomly and causes a change in the genetic makeup of a species
Down
- 1. Rain, snow, sleet, or hail
- 2. Amount of salt dissolved in a liquid
- 3. Remnants of an organism found in rock
- 6. Study of the earth
- 7. Transformed our ideas on evolution
- 13. Diagram showing how members of a family are related to each other
- 14. Change allows organism to be better suited for environment