Earth: An Introduction to Physical Geology
Earth: An Introduction to Physical Geology
11th Edition
ISBN: 9780321814067
Author: Edward J. Tarbuck, Frederick K. Lutgens, Dennis G Tasa
Publisher: Prentice Hall
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Chapter 1, Problem 1GST
To determine

The percentage or fraction of geological timescale that is represented by the recorded history of human kind.

Expert Solution & Answer
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Answer to Problem 1GST

The percentage or fraction of geological timescale that is represented by the recorded history of human kind is 0.000001% or 11000000 .

Explanation of Solution

Given info:

The length of recorded history for humankind is about 5000 years.

The age of the earth is 4.5 billion years.

Rounding it to the nearest billion, the age of the earth is 5 billion years.

Therefore, the fraction of geological timescale that is represented by the recorded history of human kind is 11000000 and this can be expressed in terms of percentage as 0.000001% .

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