Across
- 2. Exact age of rock layers and fossils
- 5. current era
- 6. newer rocks are on top of older rocks
- 8. life on earth started
- 9. chaotic conditions on earth
- 10. states that if a layers cuts across a layer it must be younger than the layer it cuts into
Down
- 1. dinosaur era
- 3. when rocks and plates formed
- 4. left over traces of organisms
- 7. General time of when rock layers were formed