CK-12 Foundation
Ck 12: Earth Science: Principle of Horizontality
[Free Registration/Login may be required to access all resource tools.] Rules for sedimentary rock formation.
CK-12 Foundation
Ck 12: Earth Science: Determining Relative Ages Study Guide
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.
Walter Fendt
Walter Fendt: Apps Zur Physik
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...
Science Education Resource Center at Carleton College
Serc: Outcrop Investigation: What Can Our Rocks Tell Us About the Past?
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.
Curated OER
National Park Service: Grand Canyon Geology
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...
Other
Western Oregon University: Earth System Science: Geologic Time [Pdf]
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,...
CK-12 Foundation
Ck 12: Earth Science: Principles of Relative Dating Study Guide
[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.