Question

fill in the blank to complete the statement about the geologic time scale. on the geologic time scale, scientists use the terms era and period to describe lengths of time precambrion time. before after during

Explanation:

The Precambrian is an informal term for the vast span of time before the current Phanerozoic Eon. The terms "era" and "period" are used in the Phanerozoic Eon (after Precambrian time). In the Precambrian, the time divisions are not as precisely defined with eras and periods as in the Phanerozoic.

Answer:

after