Radioactive dating geologic time scale
The age of the fossil must be determined so it can be compared to other fossil species from the same time period.
Understanding the ages of related fossil species helps scientists piece together the evolutionary history of a group of organisms.
The story of this great change in the conception of the history of Earth is not a simple one.
The chronicle of this great change can be broken into five periods; ran from AD 1600-1700.
Radiometric dating, or radioactive dating as it is sometimes called, is a method used to date rocks and other objects based on the known decay rate of radioactive isotopes.
Different methods of radiometric dating can be used to estimate the age of a variety of natural and even man-made materials.
If you asked the same question of an educated European in AD 1900 you would have received a quite different answer.The major time periods in earth's history are introduced, as well as are fossils and the role they play in helping us understand this history.Students will likely have been introduced to the geologic time scale in earlier grades, so this lesson is structured loosely to enable you to adapt the content to match the levels and needs of your particular students.A fossil can be studied to determine what kind of organism it represents, how the organism lived, and how it was preserved.