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    Astronomical Society of the Pacific
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    This fun, nighttime hands-on astronomy activity lets learners explore how long it takes for light from different objects in the universe to reach Earth. The activity shows participants the...

    1 cent - $1 per group Ages 8 - adult 1 to 2 hours
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    University of Washington
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    In this activity (3rd on the page), learners investigate circadian rhythms by examining how well people do with estimating time. In order to explore the question, "Do people have built in...

    free Ages 8 - 18 30 to 45 minutes
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    NASA
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    Through a series of simple body movements, learners gain insight into the relationship between time and astronomical motions of Earth (rotation about its axis, and orbit around the Sun), and also...

    $5 - $10 per group Ages 11 - adult 2 to 4 hours
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    Center for Engineering Educational Outreach, Tufts University
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    Learners construct one or more of the following kinds of sundials: a shadow plot, a horizontal sundial, and a diptych sundial. They track the position of the sun during the course of a day, and use...

    $1 - $5 per student Ages 11 - 14 1 to 7 days
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    The Exploratorium
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    Before there were clocks, people used shadows to tell time. In this outdoor activity, learners will discover how to tell time using only a compass, a pencil, a handy printout, and a sunny day....

    $5 - $10 per group Ages 8 - 14 10 to 30 minutes
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    The Exploratorium
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    This activity shows how our experience of the Sun changes with time and location. The sun dagger at Chaco Canyon is thought by many to be a sort of ancient timekeeping device. By creating a place...

    $5 - $10 per student Ages 8 - 14 45 to 60 minutes
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    The University of Texas McDonald Observatory
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    In this activity, learners make an equatorial sundial, which is simple to construct and teaches fundamental astronomical concepts. Learners use the provided template and a straw to build the...

    1 cent - $1 per group Ages 11 - 18 2 to 4 hours
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    American Association for the Advancement of Science
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    A group of learners models the Sun shining on the Earth. By rotating the Earth, they demonstrate how the Sun only shines on a portion of the Earth at a time. Learners understand why there are...

    free Ages 8 - 11 10 to 30 minutes
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    Lawrence Hall of Science
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    This assortment of mathematical games can be played while traveling. Suggestions include: estimate time until arrival and use a watch to track it; talk about turns and directions; count traffic...

    free Ages 4 - 14 10 to 30 minutes
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    NSBRI
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    In this activity (on page 12 of the PDF), learners make a sundial (shadow clock) appropriate for their geographic location in the northern hemisphere and use it to tell time. This is an...

    $1 - $5 per group Ages 8 - 14 1 to 7 days

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