Question

Identify three eras that geologists use to divide time?

a) Paleozoic, Mesozoic, Cenozoic
b) Triassic, Jurassic, Cretaceous
c) Precambrian, Cambrian, Ordovician
d) Archean, Proterozoic, Phanerozoic

Answer 1

Geologists divide time into three eras: Paleozoic, Mesozoic, and Cenozoic.

Step-by-step explanation:

Geologists use three eras to divide time:

Paleozoic: The Paleozoic era is the earliest of the three geologic eras in the Phanerozoic Eon. It lasted from 541 to 252 million years ago and is subdivided into six periods, including the Cambrian, Ordovician, Silurian, Devonian, Carboniferous, and Permian.

Mesozoic: The Mesozoic era is the second era in the Phanerozoic Eon. It lasted from 252 to 66 million years ago and is subdivided into three periods: the Triassic, Jurassic, and Cretaceous. This era is often referred to as the Age of Reptiles or the Dinosaur Age.

Cenozoic: The Cenozoic era is the most recent era in the Phanerozoic Eon. It began 66 million years ago and continues to the present day. It is subdivided into three major periods: the Paleogene, Neogene, and Quaternary. This era is often referred to as the Age of Mammals.