Which of the following is correct regarding the geologic time scale?
A) The Jurassic period occurred during the Paleozoic era.
B) Over 87 percent of Earth's history has elapsed during the more recent Cenozoic, Mesozoic, and Paleozoic eras.
C) The bulk of Earth's history has occurred during the Precambrian eon.
D) We live in the Tertiary period.

Question

Which of the following is correct regarding the geologic time scale?
A) The Jurassic period occurred during the Paleozoic era. 
B) Over 87 percent of Earth's history has elapsed during the more recent Cenozoic, Mesozoic, and Paleozoic eras. 
C) The bulk of Earth's history has occurred during the Precambrian eon. 
D) We live in the Tertiary period.

Quizplus · Accepted Answer

The bulk of Earth's history has occurred during the Precambrian eon, which lasted from about 4.6 billion years ago to 541 million years ago. The Paleozoic, Mesozoic, and Cenozoic eras make up only about 13 percent of Earth's history.

Answer: D 
 We do not live in the Tertiary period. The Tertiary period, which lasted from 65 million to 2.6 million years ago, is now recognized as part of the larger Cenozoic era. We currently live in the Quaternary period of the Cenozoic era.

Therefore, the correct answer is C.

Which of the Following Is Correct Regarding the Geologic Time