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Radioactive dating exercises

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Students are able to visualize and model what is meant by the half-life of a reaction.

By extension, this experiment is a useful analogy to radioactive decay and carbon dating.

You worked in small groups and as a class to complete the "If Scientists Think. Today's assignment will allow you to compare and contrast your ideas to some of the actual methods scientists used to develop an estimation of the age of the Earth.

Following this introduction, there are several links to different sites concerning the methods scientists use to assist them in estimating the age of the Earth.

We previously reported an event organized by the Adelaide, Australia, Chapter of Reasonable Faith where Dr Justin Payne, a lecturer within the School of Earth and Environmental Sciences at the University of Adelaide, sought to ‘disprove’ objections to long-age radiometric dating.

Any age calculated is based on multiple unprovable assumptions to match the long-age worldview.

Kevin Rogers submitted a comment to that article (reproduced below, edited to focus on substantive issues), to which Dr Jim Mason replies.

Radioactive Dating Methods I am Kevin Rogers and am the director of Reasonable Faith Adelaide.

radioactive dating exercises-3

Because this assignment is linked with your work in Assignment 3, you will have "If Scientists Think. Before scientists had modern technology to assist them in their research, they had to use their power of observation to infer the relative ages of the rocks they were studying.

Carbon has two stable, nonradioactive isotopes: carbon-12 (12C) and carbon-13 (13C).

There are also trace amounts of the unstable radioisotope carbon-14 (14C) on Earth.

Jim raised some interesting points but I don’t believe that he addressed the central points that Justin raised.

Jim stated that “uranium is preferentially encased in these [zircon] crystals while lead is preferentially excluded” but did not fully explain the significance of this.