The earliest 88 percent of geologic time is represented by the time span informally called the ________.
A)Paleozoic
B)Precambrian
C)Mesozoic
D)Phanerozoic

Question

Quizplus · Accepted Answer

The Precambrian includes the first 88 percent of geologic time, before the start of the Paleozoic era. Therefore, option B is the correct answer. Option A (Paleozoic) represents a specific era within the Phanerozoic eon, which makes up only the most recent 12 percent of geologic time. Option C (Mesozoic) is also a specific era within the Phanerozoic eon, representing a smaller portion of time than the Paleozoic. Option D (Phanerozoic) includes all of geologic time since the start of the Paleozoic, so it is not the best choice for the earliest 88 percent of geologic time.

The Earliest 88 Percent of Geologic Time Is Represented by the Time