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Lesson 9

How Do We Know What Plants and Animals Were Like Long, Long Ago?

Big Idea:

Fossil evidence can tell us how ancient and present-day organisms change over time.



Students hear about the discovery of an amazing fossil on “Mirounga Island.” They then watch a video to learn how fossils are formed and predict which parts of real-life organisms might be preserved by fossilization. Students figure out together why scientists were so excited by the fossil they uncovered.

Materials to Have Ready

​​For each student:

Notebook page 19

For each small group:​

A handout of pictures of 6 present-day animals and plants

Drawing of rock layers

Download Materials

How Fossils Are Made

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