CK-12 Foundation
Ck 12: Earth Science: Tree Rings, Ice Cores, and Varves
[Free Registration/Login may be required to access all resource tools.] How scientists can determine age and other features of a rock or material it contains.
CK-12 Foundation
Ck 12: Earth Science: Tree Rings, Ice Cores, and Varves
[Free Registration/Login may be required to access all resource tools.] How scientists can determine age and other features of a rock or other material.
University of Texas at Austin
University of Texas: Texas Memorial Museum: Understanding Geologic Time [Pdf]
A lesson plan containing two activities for students to gain a better understanding of geologic time scale. The first activity allows students to get a visual of geologic time by role playing events in time on a football field. The...