Across
- 3. Wiggle your ________
- 6. Bone above ulna
- 8. Bone under radius
- 10. Another word for a backbone
- 12. Rocks made of loose, eroded particles that harden together over time
- 14. Layers of rock
- 15. Determining if one rock is older than the other
Down
- 1. Refers to an approximate age of a rock layer
- 2. A living thing
- 4. The naturally preserved remains or impressions of organisms from long ago
- 5. Broken down pieces of rock that are moved from one place and deposited in another
- 7. Fossils used by scientists to more accurately determine the age of a nearby fossil or layer of rock
- 9. States that a layer of rock is younger than the layer below it and older than the layer above it
- 11. The numerical age of a rock layer
- 13. The study of strata to determine the history of the land