Stuck on this dot point (1 Viewer)

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Hi can someone please tell me what I am suppose to write for the dot point "Relate the age of the Earth to the age in which geological time is described"

Are we meant to remember the five main geological eras: Archaean, Proterozoic, Palaeozoic, Mesozoic and Cainozoic (Cenozoic)????

Thanks in advnce