Across
- 2. the exact age of a rock
- 4. rocks age compared with another rock
- 7. the things that cut through other things are younger than the things around it
- 8. old bones or rocks
- 9. the inside is older than the things on the outside
Down
- 1. before writing (long time ago)
- 3. way to find the age of a rock
- 5. Decay
- 6. way to describe and categorize ancient time
- 10. rocks on top are old than the bottom