Across
- 3. The approximate age of a fossil
- 4. Any geologic feature that cuts through rocks or alters another part must be more recent.
- 5. When scientists use the physical appearance of an object to determine its age
- 7. determines if one rock is younger or older than the other
- 9. remain of prehistoric organisms
- 10. When the older rocks are at the bottom layers and the younger rocks are at the top layers
Down
- 1. The remains of organisms that lived for a limited time
- 2. When a rock formation contains other pieces of other rock formations, the included rock is older than the host rock
- 6. The exact date or time of the rock, the exact age of the rock
- 8. The Rate of Decay of unstable fossils