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    Bridge: Online Ocean Science Education Resource Center
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    In this data collection and analysis activity, learners evaluate fish physiology and ecology using vision research data from Dr. Kerstin Fritsches at the University of Queensland in Brisbane,...

    free Ages 14 - 18 1 to 2 hours
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    The Exploratorium
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    Do you have a hard time matching paint swatches with your furniture? When you consider human perception, color is context dependent. In this Exploratorium produced activity, you will see how you...

    1 cent - $1 per student Ages 4 - adult 5 to 10 minutes
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    The Exploratorium
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    Create an illusion where it appears that your hand has a hole in it. You'll see the results from when one eye gets conflicting information.

    1 cent - $1 per student Ages 4 - 14 Under 5 minutes
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    National Health Museum
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    In this activity, learners experience firsthand how marine animals' adaptive coloration camouflages them from prey. Learners design fish out of red paper and then attempt to locate their fish...

    $1 - $5 per group Ages 14 - 18 45 to 60 minutes
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    Lawrence Hall of Science
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    In this outdoor activity, learners use only their senses to to find the extremes of several environmental variables or physical factors: wind, temperature, light, slope and moisture. Learners also...

    $1 - $5 per group Ages 6 - 14 30 to 45 minutes
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    Miami Science Museum
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    In this activity about vision and optical illusions, learners conduct a simple test to demonstrate how our eyes create "afterimages." Learners stare at a black cardboard bat for at least...

    1 cent - $1 per student Ages 8 - 18 Under 5 minutes
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    Mount Holyoke College
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    In this four-part activity, learners explore light and sound through a variety of hands-on investigations. First, learners explore sound waves and observe how sound can travel through other...

    $5 - $10 per group Ages 8 - 14 1 to 2 hours
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    The Exploratorium
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    Make a big canvas of iridescent color with pvc pipe! In this Exploratorium Science Snack, you'll need to cut and assemble some PVC pipe, but the pay-off, the soap-bubble canvas, is big....

    1 cent - $1 per student Ages 6 - 18 5 to 10 minutes
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    University of Washington
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    In this activity (1st on the page), learners find their blind spot--the area on the retina without receptors that respond to light. Learners can draw their own blind spot testers, use the provided...

    1 cent - $1 per group Ages 8 - 18 10 to 30 minutes
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    The Exploratorium
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    In this quick optics activity, learners use a dim point of light (a disassembled Mini MagLite and dowel set-up) to cast a shadow of the blood supply in their retina onto the retina itself. This...

    $1 - $5 per student Ages 8 - 14 Under 5 minutes

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