From first to last,name the eons on the Geologic Time Scale.
A)Phanerozoic,Proterozoic,Archean,Hadean.
B)Hadean,Archean,Proterozoic,Phanerozoic.
C)Proterozoic,Phanerozoic,Hadean,Archean.
D)Precambrian,Phanerozoic,Proterozoic,Paleozoic.

Question

Quizplus · Accepted Answer

The Geologic Time Scale is divided into four eons: Hadean, Archean, Proterozoic, and Phanerozoic. The Hadean Eon represents the earliest stage of Earth's history, starting from the formation of the planet approximately 4.6 billion years ago to the end of the heavy bombardment period around 3.8 billion years ago. The Archean Eon is characterized by the first signs of life on Earth and extends from 3.8 billion to 2.5 billion years ago. The Proterozoic Eon witnessed the evolution of complex life forms and covers the period from 2.5 billion to 541 million years ago. Finally, the Phanerozoic Eon covers the most recent period of Earth's history, beginning with the Cambrian Explosion 541 million years ago and continuing to the present day. Therefore, the correct order of the eons on the Geologic Time Scale is B: Hadean, Archean, Proterozoic, and Phanerozoic.

From First to Last,name the Eons on the Geologic Time