Which geological timescale contains the greatest number of years?
A) eras
B) periods
C) epochs
D) centuries
E) decades The geological timescale divides the history of life on Earth into eras, then periods, and then epochs.

Question

Quizplus · Accepted Answer

Eras are the broadest division of geological time and typically span hundreds of millions of years. Therefore, they contain the greatest number of years compared to periods and epochs. Centuries and decades are much smaller units of time and are not used in the geological timescale.

Which Geological Timescale Contains the Greatest Number of Years