Across
- 3. one cell organisms and no land animals
- 8. "Age of the dinosaurs"
- 10. studies fossils and earth's history
- 11. Super continent, was formed during Paleozoic
- 12. Lived during the Mesozoic
Down
- 1. planet formed during which era?
- 2. bones from past living animals/things
- 4. One cell organism
- 5. Current era and age of mammals
- 6. study's rock formations
- 7. Pangaea forms
- 9. These give birth to live young