Which of the following time periods is the longest?
Eon.
Era.
Age.
Period.
Detailed Explanation
In the geologic time scale, an eon encompasses 500 million years, whereas an era encompasses 100-150 million years. Periods and ages are much shorter, in the range of 1-10 million years.
Take more free practice tests for other ASVAB topics with our ASVAB practice tests now!