The answer is:
False
The explanation:
The Paleozoic Era is not the longest time period in the history of earth because the longest time period in the history of earth is Precambrian.
The Precambrian is the period before the Cambrian Era . It is consist of three eras ( Hadean , Archean , and Proterozoic ), The Precambrian covers nearly 90 % of the all history of the earth. and include the geologic time period about 600 million years ago.
