In radiometric dating, scientists use the half-life of a radioactive isotope, to determine the approximate age of rocks, and the fossils that are embedded in them. Half-life is the time it takes for half of a radioactive element to become stable.Uranium 238 (238U) is a radioactive element that decays into Lead (206Pb) after 4.5 billion years.6) Scientists found a fossil in a layer of rock that tested as 1/8th U and 7/8th Pb. What is the approximate age of the fossil?A) 562 million years old B) 4.5 billion years old C) 9 billion years old D) 13.5 billion years oldNot Graded

two isotopes of uranium are used for radiometric dating . uranium -238 decays to form lead -206 with…

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radiometric dating

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter11: Evidence Of Evolution

Section: Chapter Questions

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Question

In radiometric dating, scientists use the half-life of a radioactive isotope, to determine the approximate age of rocks, and the fossils that are embedded in them. Half-life is the time it takes for half of a radioactive element to become stable.

Uranium 238 (²³⁸U) is a radioactive element that decays into Lead (²⁰⁶Pb) after 4.5 billion years.

6) Scientists found a fossil in a layer of rock that tested as 1/8th U and 7/8th Pb. What is the approximate age of the fossil?

A) 562 million years old

B) 4.5 billion years old

C) 9 billion years old

D) 13.5 billion years old

Not Graded

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