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    The University of Texas McDonald Observatory
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    In this experiment, learners construct an equilateral triangle using graph paper, a pencil, protractor and ruler. They also make a "laser triangle" using a laser pointer and front...

    $1 - $5 per group Ages 14 - 18 45 to 60 minutes
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    The University of Texas McDonald Observatory
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    In this activity, learners carry out a scientific investigation of dust in their classroom. Learners produce an analysis on graph paper of the dust they collect over the course of a few days. Then,...

    $1 - $5 per group Ages 11 - 18 1 to 7 days
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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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    The University of Texas McDonald Observatory
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    In this activity, learners test the Law of Reflection based on experimental evidence. Learners produce raw data and explanations based on their data: pencil tracings of incident and reflection rays...

    $1 - $5 per group Ages 14 - 18 45 to 60 minutes
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    The University of Texas McDonald Observatory
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    In this activity, learners use the Sun's energy to cook marshmallows. Learners construct the solar oven out of simple everyday materials. They experiment to see how the color of the...

    $1 - $5 per group 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 set up an experiment to investigate the effects of hot air on the path of a laser beam. They observe the wandering position of the laser beam spot on the wall after the...

    $1 - $5 per group Ages 14 - 18 45 to 60 minutes
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    The University of Texas McDonald Observatory
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    In this activity, learners construct their own spectroscope as they explore and observe spectra from familiar light sources. Learners can be challenged to make technological improvements to their...

    $5 - $10 per group Ages 14 - 18 45 to 60 minutes