# Absolute age dating example of research

This section does not cite any sources. Sedimentary rocks in particular are notoriously radioactive-free zones. The absolute age of a material is much more desirable when constructing the timeline of our planet because it does not rely on comparisons to other materials. Scientists who study the ancient Earth have been working for hundreds of years to build an accurate timeline of the formation of the planet and the evolution of all life. Radiocarbon dating also simply called carbon dating is one of the most widely used and famous types of absolute age dating.

This rate of decay is called a half-life. Relative age dating also means paying attention to crosscutting relationships.

This comes first, that comes next, this comes last. In this lesson, you'll learn how scientists determine the absolute age of materials.

Each radioactive isotope works best for particular applications. This type of dating is very similar to radiocarbon dating, in that is uses essentially the same methods. This light can be measured to determine the last time the item was heated. If a rock has been partially melted, or otherwise metamorphosed, that causes complications for radiometric absolute age dating as well. This technique is based on the principle that all objects absorb radiation from the environment.

With potassium-argon dating, scientists can figure out the age of samples that are billions of years old. This technique relates changes in amino acid molecules to the time elapsed since they were formed. You might have noticed that many of the oldest age dates come from a mineral called zircon. Take students on a neighborhood walk and see what you can observe about age dates around you.

Like this lesson Share Imagine braving the desert heat for days or even weeks as you dig for dinosaur bones. There are a couple catches, of course. Thus, measuring the ratio of D to L in a sample enables one to estimate how long ago the specimen died. Half-life simply means the amount of time it takes for half of a remaining particular isotope to decay to a daughter product. Some scientists prefer to call it calendar age, because the term suggests that the age can be plotted on a calendar.

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