Across
- 2. early life.
- 4. age-how scientists determine the age of a rock.
- 5. of dinosaurs.
- 7. earth had calmed and stabillized.
- 9. the sequence is undisterbed the younger layer will be on top and the older will be underneath.
- 10. rock fragments that are included in a rock must be older than the rock in which they are included.
Down
- 1. age-the age of a rock.
- 3. system still forming.
- 6. 6.5 million years ago to present day.
- 8. the sequence o defying how old a rock is by cuttng through it if you can cut through it its younger and if you cant its older.