Extensive information about the geology of the Grand Canyon. Looks at some principles of geology evident there, forces that have shaped its geological features, how its valleys and canyons were formed, the characteristics of the Colorado...

One of the most fundamental principles of archaeology is the Law of Superposition. This website provides a diagram showing you the Law of Superposition.

After a study of the principle of original horizontality and the law of superposition, and how to determine the ages of rock layers and how they are formed, students go on a field study to observe and gather information about rock...

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

Extensive information about how waves behave in an elastic medium. Covers different types of waves, their characteristics and behavior, the anatomy of the ear, the speed of sound in different media, the parts of a wave, and wave phenomena.

[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...

This lesson involves an innovative strategy for introducing the concept of relative dating using a block of wood that has been painted, damaged, and nailed. The task for students is to analyze the order in which these events happened and...

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.

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...

A resource highlighting the process of dating methods in archaeology. Look at Relative Dating and Absolute Dating systems.

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.

This site, in German, offers numerous apps that illustrate common physics principles. Apps are organized into categories: mechanics, oscillations and waves, electrodynamics, optics, thermodynamics, the theory of relativity, physics of...