Across
- 2. studies earth
- 3. the remains of something
- 5. of superposition: rock on top are younger than the one on the bottom
- 7. dating: comparing it something to find the age
- 9. dating: finding the exact age
Down
- 1. rate of decaying
- 4. rock layer
- 6. how old something is
- 8. fossil: helps when dating
- 10. of crosscutting: they are younger when cut through something