NOVA Online | The Vikings - 0 views
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Eric Cullander on 25 Jul 13"Build a Tree-Ring Timeline (Hot Science) Learn about the study of tree rings, which scientists have used to date the remains of Viking ships, and try your hand at creating your own tree-ring chronology. "
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Vickie Costello on 25 Jul 13This activity is fun (takes a new version of shockwave), however it may create a misconception. The "chronology" is built by chaining tree cores together to span from 2000 - 1840. The activity in Natural Inquirer that uses for paper "cores" is more realistic because there is more "vertical" overlap in time.