Is radiometric dating relative or absolute

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This is a relatively long activity so stay focused on your work.

Let your TA or Professor see your Certificate of Completion once you reach that screen at the end of the activity.

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.

You will investigate Steno's Laws, radiometric dating, and then visit an interactive site that will help you better understand how to tell time - with geology! As you proceed through Assignment 4, be sure to compare your answers from "If Scientists Think. ." to the actual methods scientists use to estimate the age of prehistoric objects.

Steno developed a set of Laws (Steno's Laws) to help explain his method of inferring the ages of geological structures.

These laws are a set of hypotheses that the scientific community accepts as a starting basis without absolute proof.

You have probably heard of mummies that have been dated with the Carbon-14 method.

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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.

When it comes to determining the age of stuff scientists dig out of the ground, whether fossil or artifact, “there are good dates and bad dates and ugly dates,” says paleoanthropologist John Shea of Stony Brook University.

The good dates are confirmed using at least two different methods, ideally involving multiple independent labs for each method to cross-check results.

Now that you have discovered the method that scientists originally used to date geological features, you may be questioning the accuracy of this dating method.

After all, it is possible that rock layers can be disturbed, overturned, and altered in both natural and unnatural ways.

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