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    University of Washington
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    In this activity (6th on the page), learners investigate how photoreceptors in the eye (rods and cones) "adapt" to low light conditions. Learners sort similar bottle caps in a well-lit...

    free Ages 8 - 18 10 to 30 minutes
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    California Academy of Sciences
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    In this activity, learners will review the functions of basic digestive organs, understand how diet affects digestion, understand how digestive tracks may differ, and then step outside to compare...

    free Ages 8 - 18 30 to 45 minutes
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    University of Washington
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    In this demonstration (18th on the page), learners conduct a simple test to explore how the cornea refracts light, which is further bent by the eye lens through a process known as accommodation....

    free Ages 8 - 18 Under 5 minutes
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    University of Washington
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    In this quick activity/demonstration (5th on the page), learners explore depth perception. Learners look at an object in the distance, close one eye, hold up their finger in line with the object,...

    free Ages 6 - 18 Under 5 minutes
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    University of Washington
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    In this easy demonstration (3rd on the page), learners explore depth perception by conducting a test with two pencils. Learners hold the ends of two pencils, one in each hand at arm's-length...

    free Ages 4 - 18 Under 5 minutes
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    NOAA
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    In this activity (on page 7), learners explore the meaning of a "carbon sink." Using simple props, learners and/or an educator demonstrate how plants act as carbon sinks and how...

    free Ages 8 - 14 45 to 60 minutes
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    Colorado State University
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    Use this hands-on activity to demonstrate infrared and thermal radiation. Learners will cover their eyes or wear blindfolds and then move their hands to sense the infrared heat coming from a...

    free Ages 8 - 14 Under 5 minutes
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    University of Washington
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    Use this activity (10th on the page) to help learners explore memory and how sometimes your brain makes up its own memories. Learners will read and try to remember the words in list #1. Five...

    free Ages 8 - 18 5 to 10 minutes
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    University of Washington
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    This is a quick and simple demonstration about reflexes (fourth activity on the page). One learner stands behind a see-through barrier like a window or wire screen. Another learner throws a cotton...

    free Ages 8 - 18 Under 5 minutes
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    University of Washington
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    In this demonstration (9th on the page), learners explore eyewitness memory and how memories differ amongst individuals. While the rest of the group is minding their own business (i.e. reading...

    free Ages 8 - 18 10 to 30 minutes

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