Pearson eText Biology: Science for Life with Physiology -- Instant Access (Pearson+)
Pearson eText Biology: Science for Life with Physiology -- Instant Access (Pearson+)
6th Edition
ISBN: 9780135214114
Author: Colleen Belk, Virginia Maier
Publisher: PEARSON+
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Chapter 11, Problem 2LTB
Summary Introduction

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The determination of the date when an ancient organism lived can be estimated through the age of the rocks. Radiometric dating depends on radioactive decay, as the rocks spontaneously break down into different unique elements as daughter products.

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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
Radiometric dating measures the decay of radioactive isotopes present in layers where fossils are found. True False
Radiometric decay of carbon-14 would be used in dating sedimentary rock. a trace fossil. an insect in amber. a fossil imprint. igneous rock.
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From Sea to Changing Sea | Early Life in the Oceans || Radcliffe Institute; Author: Harvard University;https://www.youtube.com/watch?v=Ac0TmDf5Feo;License: Standard youtube license