Evidence of Ice Free Seas

In this activity, students make a model sea floor sediment core using two types of buttons to represent fossil diatoms. They then compare the numbers of diatom fossils in the sediment at different depths to determine whether the seas were free of ice while the diatoms were alive.

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LuAnn Dahlman
ANDRILL
Activity takes one class period (or less). Additional materials required.

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Teaching Tips

Teaching Tips

Students should have no problem following the clear and well-written directions.

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