The toilet roll of time (PDF)

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Paria River in the Chinle Formation, Arizona and Utah

ERN Item Type: 

  • Classroom Activities


Earth Learning Idea (ELI)


This activity has been devised to address the common lack of knowledge about geological time. Research has shown that many people have no idea of the great length of geological time nor of the order of key events during the geological history of the Earth. Students will make a geological timeline using a roll of toilet paper.

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NGSS Disciplinary Core Ideas: