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Radioactive Dating with Uranium


In this video segment from A Science Odyssey, geologist Ralph Harvey and historian Mott Greene explain the principles of radiometric dating and its application in determining the age of Earth. As the uranium in rocks decays, it emits subatomic particles and turns into lead at a constant rate. Measuring the uranium-to-lead ratios in the oldest rocks on Earth gave scientists an estimated age of the planet of 4.6 billion years.

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).

http://www.teachersdomain.org/6-8/sci/phys/matter/radiodating/index.html

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