Question

put these time divisions in order, from longest to shortest.
longest
⬆️ eon
⬆️ period
⬆️ era
shortest

Explanation:

Step1: Recall geological time scales

In geological time, an eon is the longest division, followed by an era, and then a period.

Step2: Order the time divisions

So from longest to shortest: Eon, Era, Period.

Answer:

Longest: Eon
Middle: Era
Shortest: Period