Define absolute age dating

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Geologists often need to know the age of material that they find. They use absolute dating methods, sometimes called numerical dating, to give rocks an actual date, or date range, in number of years. This is different to relative dating, which only puts geological events in time order. Most absolute dates for rocks are obtained with radiometric methods.
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What is the difference between absolute age and relative age of fossils?

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Absolute dating | geochronology |

Although relative ages can generally be established on a local scale, the events recorded in rocks from different locations can be integrated into a picture of regional or global scale only if their sequence in time is firmly established. The time that has…. New methods of absolute dating, including radiocarbon dating, revolutionized the understanding of this phase in prehistoric Europe. They showed that many supposedly interdependent developments had in fact developed independently and been separated by centuries.
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Difference Between Relative and Absolute Dating

Relative age allows scientists to know whether something is older or younger than something else, while absolute age means that scientists know the exact number in years that have passed since the object was created. Relative age will require the comparison of two or more objects, whereas absolute age does not. Relative age comes up often in various fields, such as archeology.
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Absolute dating is the process of determining an age on a specified time scale in archaeology and geology. Some scientists prefer the terms chronometric or calendar dating, as use of the word "absolute" implies an unwarranted certainty and precision. Absolute dating provides a numerical age or range in contrast with relative dating which places events in order without any measure of the age between events. In archeology, absolute dating is usually based on the physical, chemical, and life properties of the materials of artifacts, buildings, or other items that have been modified by humans and by historical associations with materials with known dates.
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