Absolute dating is used to determine a precise age of a fossil by using radiometric dating to measure the decay of isotopes, either within the fossil or more often the rocks associated with it.
The majority of the time fossils are dated using relative dating techniques.
A fossil can be studied to determine what kind of organism it represents, how the organism lived, and how it was preserved.
However, by itself a fossil has little meaning unless it is placed within some context.
Despite seeming like a relatively stable place, the Earth's surface has changed dramatically over the past 4.6 billion years.
Mountains have been built and eroded, continents and oceans have moved great distances, and the Earth has fluctuated from being extremely cold and almost completely covered with ice to being very warm and ice-free.
Or use it to find and download high-quality how-to Power Point ppt presentations with illustrated or animated slides that will teach you how to do something new, also for free.
Or use it to upload your own Power Point slides so you can share them with your teachers, class, students, bosses, employees, customers, potential investors or the world.
Or use it to create really cool photo slideshows - with 2D and 3D transitions, animation, and your choice of music - that you can share with your Facebook friends or Google circles. For a small fee you can get the industry's best online privacy or publicly promote your presentations and slide shows with top rankings. We'll even convert your presentations and slide shows into the universal Flash format with all their original multimedia glory, including animation, 2D and 3D transition effects, embedded music or other audio, or even video embedded in slides. Most of the presentations and slideshows on Power are free to view, many are even free to download. Or use it to find and download high-quality how-to Power Point ppt presentations with illustrated or animated slides that will teach you how to do something new, also for free.
Scientists can use certain types of fossils referred to as index fossils to assist in relative dating via correlation.
Index fossils are fossils that are known to only occur within a very specific age range.