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Actvity Summary: Students investigate relative size using foraminifera and explore averages, magnification, and the importance of forams to the oceanic food chain.


Using the Microfossils: the ocean’s storytellers poster, this lesson will help students understand the size of microfossils found in core samples and that an almost incomprehensible number of microfossils are deposited ins seafloor sediments worldwide. Students will also gain a better grasp of the idea that even though something is very small, it can be quite significant.


  • Standard A: Unifying concepts and processes in science
  • Standard D: Life science
  • Standard E: Earth and space science