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  • Finding the Crater

    Finding the Crater

    Activity

    This hands-on activity requires students to “visit” different K-T boundary sites.

  • 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.

  • Paleoclimate: A History of Change

    Paleoclimate: A History of Change

    Click & Learn

    Earth's climate is a complex system controlled by many factors. This Click and Learn will examine the two most important factors: solar radiation and the composition of Earth's atmosphere. Worksheet available in Spanish.

  • Classroom Activities: What is My Carbon Footprint?

    Classroom Activities: What is My Carbon Footprint?

    Activity

    To accompany the lecture series Changing Planet: Past, Present, Future. Using an online calculator, you will estimate your household’s carbon footprint and explore various actions to reduce it. Also available in Spanish.

  • 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.

  • Plate Tectonics

    Plate Tectonics

    Animation

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

  • EarthViewer Data Files

    EarthViewer Data Files

    Activity

    Summaries and links to the data files used to create the charts in EarthViewer, including the APK file to manually install the app.

  • Deep History of Life on Earth

    Deep History of Life on Earth

    Click & Learn

    The record of life on Earth stretches over 3 billion years. Deep time and Earth history are keys to understanding the present.

  • Dramatic Retreat of Arctic Sea Ice in 2012

    Dramatic Retreat of Arctic Sea Ice in 2012

    Animation

    (26 sec) Arctic sea ice melted on an unprecedented scale in 2012, opening up the fabled Northwest and Northeast passages.

  • The Geologic Carbon Cycle

    The Geologic Carbon Cycle

    Animation

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

  • Greenhouse Effect

    Greenhouse Effect

    Animation

    (2 min 14 sec) Sunlight that warms Earth is re-emitted as infrared radiation, which is absorbed by greenhouse gases and causes further warming.

  • Holmes' Model of Convection

    Holmes' Model of Convection

    Animation

    (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

    Animation

    (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

    Animation

    (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

    Animation

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

  • How To Find a Dinosaur

    How To Find a Dinosaur

    Scientists at Work

    (4 min 5 sec) Dr. Lyson describes dinosaur digs as well as his focus on prehistoric turtle fossils.

  • Protect Our Winters

    Protect Our Winters

    Clip

    (1 min 57 sec) A grassroots effort by winter sports professionals aims to convince the government to take action on climate change.

  • Isostasy is Key to Understanding Continental Drift

    Isostasy is Key to Understanding Continental Drift

    Clip

    (50 sec) The concept that continents float on a pliable mantle is an important element of the theory of continental drift.

  • The Principle of Isostasy

    The Principle of Isostasy

    Clip

    (2 min 39 sec) Continents rose in elevation after ice sheets from the last ice age retreated. This suggested that the underlying mantle is pliable.

  • Discussion with Students on The Day The Mesozoic Died Short Film

    Discussion with Students on The Day The Mesozoic Died Short Film

    Lecture

    (42 min 27 sec) Students discuss the short film after a screening at the 2012 Holiday Lectures on Science.

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