Across
- 4. Long cylinder of ice
- 7. fossils of animals from the past
- 8. how environment affects fossils
- 9. a group of similar individuals
- 11. Weather conditions in an area over a long time
- 12. trace of an organism
Down
- 1. geologic processes now explain old 1s
- 2. history of life in past indicated by fossils
- 3. interval of time in the past indicated by geologic history
- 5. single-celled life forms
- 6. Track hardened in sedimentary rock
- 10. the death of every member of a species