Georgia Department of Education
Ga Virtual Learning: Historical Geology
In this interactive tutorial you will explore how geologists use clues in rocks to determine the order in which rocks formed. Learn how principles of radioactivity are used to assign actual ages to rocks. Students will explore fossils...
Annenberg Foundation
Annenberg Learner: Earth and Space Science: The Geologic Timeline
Take this online quiz and test your knowledge of geological history, and the formation of our atmosphere, water, crust, oxygen, tectonic plates, Moon, and the rest of the Earth.