Question

What are the five eras in Earth's history?

Answer 1

Paleozoic, Mesozoic, and Cenozoic

Explanation:

Paleozoic Era - "ancient life" (such as trilobites).
Mesozoic Era - "middle life" (such as dinosaurs).
Cenozoic Era - "recent life" (such as mammals and flowering plants).

There are only 3 commonly accepted eras.