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Dating with Radioactive Carbon

This media-rich essay from the NOVA Web site explains how scientists can measure the presence of a radioactive form of carbon -- carbon-14 -- in decaying remains to calculate the ages of bones, cloth, wood, and other organic matter. The technique they use, which is effective for dating objects no more than 40,000 to 60,000 years old with a high degree of accuracy, is called radiocarbon dating.

The web page is located within Teachers'Domain, an online educational resource produced by WGBH Boston. It has two related components ? collections and courses ? that help teachers enhance their students' learning experiences and advance their own teaching skills. The Teachers' Domain collections include classroom-ready multimedia resources for use in lessons or independent study. Registration is free for everyone (teachers, students, parents).