Across
- 2. very old or from long ago
- 4. ancient remains of once-living organisms
- 6. relating to the sea or ocean
- 7. what something can be used for
- 9. community of living organisms
Down
- 1. recognize something or someone
- 3. scientist who studies fossils
- 5. having a jagged or saw-like edge
- 8. to make something known
- 10. no longer existing or living