Question

Which makes up the smallest span in the Geologic Time Scale?


Precambrian Time

Cenozoic era

Paleozoic era

Mesozoic era

Answer 1

In the Geologic Time Scale, the **Cenozoic era**, **Paleozoic era**, and **Mesozoic era** are all divisions of geologic time that are larger than the **Precambrian Time**. However, when considering the spans of time, the **Cenozoic era** is the most recent and the smallest in terms of duration compared to the vast lengths of the Precambrian, Paleozoic, and Mesozoic eras. Thus, in terms of the smallest span, the **Cenozoic era** would be considered the smallest in duration among the choices provided.