Question

In how many parts is the geological history of the earth divided on the basis of existence of the living beeings?
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Answer 1

Answer:

3 eons

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Answer 2

Answer:

The geologic history of the Earth is broken up into hierarchical chunks of time. From largest to smallest, this hierarchy includes eons, eras, periods, epochs, and ages. ... The time before the Phanerozoic is usually referred to as the Precambrian and is usually divided into the three eons shown.

For example, the entire age of the earth is divided into four eons: the Hadean Eon, the Archean Eon, the Proterozoic Eon, and the Phanerozoic Eon.

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