| Hint | Answer | % Correct | |
|---|---|---|---|
| Period | 201 - 145Ma | Jurassic | 96%
|
| Period | 252 - 201Ma | Triassic | 90%
|
| Period | 145 - 66Ma | Cretaceous | 86%
|
| Period | 540 - 485Ma | Cambrian | 80%
|
| Period | 420 - 355Ma | Devonian | 69%
|
| Period | 355 - 300Ma | Carboniferous | 67%
|
| Period | 445 -420Ma | Silurian | 65%
|
| Period | 299 - 252Ma | Permian | 63%
|
| Period | 485 - 445Ma | Ordovician | 55%
|
| Eon | 4000 - 2500Ma | Archean | 39%
|
| Eon | 2500 - 540Ma | Proterozoic | 33%
|