[Free Registration/Login may be required to access all resource tools.] How scientists have been able to determine the age of the Earth.

This comprehensive study guide covers the main terms and concepts needed for an earth science unit on determining relative ages. Review questions are included at the bottom of the study guide.

[Free Registration/Login may be required to access all resource tools.] Looks at how stratigraphy can be used to determine the relative ages of rocks, how unconformities occur, ways to match rock layers in different areas, and how...

An 81-page slideshow that looks at the principles of geology with respect to relative dating, at different concepts describing geological processes, at absolute age and radiometric dating, at the eons and eras in the geologic time scale,...

[Free Registration/Login may be required to access all resource tools.] Introduces Steno's laws, which allow scientists to decipher the geological events that occurred and the order in which they took place, including how the relative...

[Free Registration/Login may be required to access all resource tools.] This study guide summarizes key principles used in relative dating. Includes a few questions to check for understanding.

[Free Registration/Login may be required to access all resource tools.] Rules for sedimentary rock formation.

By looking at an outcrop, students make observations and prediction about Earth's history in this activity. Students will also make hypothesis about the past environment based on the observations from the outcrop.

Learn about geologic time, including the age of the Earth by putting it in terms of pages in a book.

In this amazing interactive tutorial you will learn about what methods are used by geologists to learn about the history of the Earth. Investigate a geologic time scale and learn about how scientists have developed and organized a record...

This is an in-depth activity where students create a rock layer formation using different colors of playdough and investigate the types of folds and rock formations that might occur. They take core samples through anticlines and...