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The Spring 2011 issue of The Earth Scientist is focused on modernizing seismology education. Thanks to IRIS, you can download this issue for free as a pdf. Print copies are available in our online store.

Align Tree Ring Cores Activity

Shown below are three (simulated) tree ring cores from different pieces of wood. The first (top) was taken recently from a live tree. The second (middle) was taken from a log, and the third (bottom) was taken from a beam in a log cabin. Align the cores to create a composite chronology of the climate history of this locale. Drag the cores back and forth (right and left) on the screen until their tree ring patterns align.

(Note: If you cannot see the interactive animation below, or it is not working properly, you may need to download the latest Flash player.)

 


Live Tree

Log

Beam

Last modified January 25, 2007 by Randy Russell.

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The Summer 2010 issue of The Earth Scientist, available in our online store, includes articles on rivers and snow, classroom planetariums, satellites and oceanography, hands-on astronomy, and global warming.

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