Question

Based on interpretations of rock units and changes in fossil life forms, geologists have divided Earth’s history into manageable units that are represented by the _____.

A. geologic time scale

B. geographical time scale

C. Precambrian time scale

D. fossil time scale

Answer 1

The answer in the space provided is geographical time scale, which is letter b. The geographical time scale or also known as GTS is a system in which it provides chronological dating in means of describing the relationships or timing of events that occurred in the past or the history of the earth.

Answer 2

The answer is A. The division in geologic time is not equal, some are longer than others (time is in millions of years). Example of geologic scales is Permian, Triassic, Precambrian and the Paleozoic. The geologic time scale is also sub-divided into era, periods and epochs based on principles of fossil evidence, relative dating, and radiometric dating.