What is the first geological period of the Paleozoic era?

Question

Hint:

1. Paleozoic Era = 543 million years ago (starting with the Cambrian period - shellfish, trilobites)
2. Mesozoic Era = 248 million years ago (starting with the Triassic period - dinosaurs, mammals)
3. _______ Era = 65 million years ago (starting with the Tertiary period - mass extinction)

Answer 1

The Paleozoic Periods: Cambrian Ordovician Silurian Devonian Carboniferous Permian. The Paleozoic (meaning "time of ancient life)" Era lasted from 544 to 245 million years ago, and is divided into six periods.