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Showing 1-6 of 6 Resources
  • EarthViewer

    EarthViewer

    Click & Learn

    Download the accompanying student worksheet under "Downloads." What did Earth look like 250 million years ago? Or 1 billion years ago? Or 4.5 billion years ago? EarthViewer is an interactive tool that allows you to explore the science of Earth's deep history.

  • Geological History of Oxygen

    Geological History of Oxygen

    Click & Learn

    Explore the changes in oxygen levels throughout Earth’s history and discover their impact on life.

  • The Day the Mesozoic Died

    The Day the Mesozoic Died

    Short Film

    (33 min 43 sec) The disappearance of the dinosaurs at the end of the Cretaceous period posed one of the greatest, long-standing scientific mysteries. This three-act film tells the story of the extraordinary detective work that solved it. Also available in Spanish.

  • Calculating Iridium Fallout From an Asteroid Impact

    Calculating Iridium Fallout From an Asteroid Impact

    Activity

    A worksheet in which students calculate how much iridium was released, and eventually deposited all over the Earth, by the impact of the asteroid that caused the K-T extinction.

  • Chemical Signatures of Asteroid Impacts

    Chemical Signatures of Asteroid Impacts

    Activity

    A lesson in which students analyze the chemical data that led researchers to conclude that the K-T boundary layer contained an extraordinary concentration of iridium. 

  • Winogradsky columns: Microbial ecology in the classroom

    Winogradsky columns: Microbial ecology in the classroom

    Activity

    An activity that recreates zones of microbial activity in a glass column. To accompany the lecture series Changing Planet: Past, Present, Future.