5.2 Radioactivity Is Natural

Radioactivity Is Natural (Textbook)

Radiation Occurs Naturally

Discussions of the various origins of radioactivity. Attention is given to how radiation is measured in both rads and rems. Duration: 9:15.

Field Trip to an Underground Aquifer

Kai takes a field trip to an underground aquifer where he learns about an application of radioactive tracers. A humorous, but informative presentation. Duration: 4:17.