1. I. Absolute Dating Absolute dating
any method of measuring the age of an event or object in years.
Paleontologist can date
many types of igneous
rocks as well as recent
organic fossils.
Using Half-lives to Date Fossils

2. II. Radiometric Dating
A. Radioactive Decay Process in which a radioactive isotope breaks down into a stable isotope of the same or another element.

3. II. Radiometric Dating
B. Radiometric dating Scientist determine the age of an object by estimating the percentages of radioactive (parent) to stable isotopes (daughter).
PBS Radiometric Dating
Explanation

4. C. Half-life
Half-life the time needed for half of a sample of radioactive substance to undergo radioactive decay.

5. Radioactive Decay
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6. Using Half-lives to Date Fossils
Evidence of Events in Earths history web simulation