This group is dedicated to providing information about the scientific method as it concerns the idea of evolution in the Creation/Evolution debate. The site provides background information about stratigraphic principles and relative time, biostratigraphy (using fossils for relative dating), and radiometric dating.
Scientists have developed technology that can accurately date rocks using radioactive materials which are fixed into the rocks as they form from sediments.
This dating technique is known as radiometric dating.
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.
The process of Relative Dating was established by Nicholaus Steno in the 1600's.
Keep these principles in mind as you progress through the rest of the activities in this assignment.
It would benefit your understanding of this material if you studied the rest of this website on your own, but it is not required for class.
To obtain further practice with the concepts of Steno's laws and geologic dating, work through the Understanding Geological Time section of this assignment.
This portion of the assignment is an interactive web site that allows you to apply what you have learned and to learn more about how scientists tell time with geology.
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.
The idea of radioactive decay and half lives, a type of absolute dating, is shown through an activity using M&M's candy and graph paper. Sequencing Time, University of California, Berkeley. This 5-12-grade activity lets students place parts of their own life story into a time line so that they can better understand how geologic time is reconstructed by scientists.