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6. In the 542 MA Era what was the second system?
- Carboniferous
- Devonian
- Cambrian
7. How long ago was the Palaeozoic Era?
8. Which is the oldest system in the Palaeozoic Era?
- Cambrian
- Carboniferous
- Precambrian
9. What is the second system in the Cenozoic Era?
- Palaeogene
- Neogene
- Denogene
10. What is the 3rd Systems in the Palaeozoic Era called?
- Devonian
- Silurian
- Ordovician
11. What are the different systems in the Palaeozoic Era?
- Permian, Carboniferous, Devonian, Silurian, Ordovician, Cambrian
- Triassic, Devonian, Neogen, Silurian, Ordovician, Cretaceous
- Carboniferous, Palaeogene, Permian, Cambrian, Precambrian, Jurassic
12. Which Era is the most recent?
- Cenozoic
- Precambrian
- Cambrian
13. How long ago was the Precambrian period?
14. Which system was the most recent in the Mesozoic Era?
- Cretaceous
- Triassic
- Jurassic
15. Which system is the most recent in the Mesozoic Era?
- Cretaceous
- Jurassic
- Triassic
16. How many systems does the Palaeozoic Era have?
17. What is another word for system?
18. Which Era does the Triassic system belong to?
- Mesozoic
- Cenozoic
- Precambrian
19. What are the two systems in the Cenozoic Era?
- Neogene, Palaeogene
- Cretaceous, Permian
- Carboniferous, Neogene
20. How long ago was the Mesozoic Era?