Search Results

Showing 1-8 of 8 Resources
  • Ocean Acidification

    Ocean Acidification


    In this hands-on activity, students simulate the effects of decreasing pH caused by rising levels of atmospheric carbon dioxide.

  • Discovering the Wallace Line

    Discovering the Wallace Line


    This activity supports the HHMI short film The Origin of Species: The Making of a Theory. Students are presented with a map of the Malay Archipelago and some field notebooks with observations of animals. By plotting which animals are found on which island, the students discover the Wallace Line—a sharp boundary that separates distinct Asian and Australian fauna. 

  • Plate Tectonics

    Plate Tectonics


    (1 min 16 sec) Plate tectonics is the unifying theory of Earth science.

  • The Geologic Carbon Cycle

    The Geologic Carbon Cycle


    (6 min 20 sec) CO2 emitted by volcanoes into the atmosphere is removed by a series of chemical reactions related to rock weathering.

  • Holmes' Model of Convection

    Holmes' Model of Convection


    (45 sec) An early continental drift model proposed that mantle convection can produce continental movement and new plate formation.

  • Daly's Model of Subduction

    Daly's Model of Subduction


    (2 min 19 sec) An early model of continental drift proposed that parts of continental plates can sink into the mantle, allowing for movement.

  • Continental Movement Over the Past 200 Million Years

    Continental Movement Over the Past 200 Million Years


    (1 min 1 sec) The breakup of a supercontinent into several smaller continents explains the distribution of fossil and geologic evidence.

  • Arctic Island Was a Tropical Island 500 Million Years Ago

    Arctic Island Was a Tropical Island 500 Million Years Ago


    (47 sec) Reconstructing past continental plate movements reveals the island of Spitsbergen was tropical 500 million years ago.