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Showing results 121 to 140 of 171
Depth Perception
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In this easy demonstration (3rd on the page), learners explore depth perception by conducting a test with two pencils.
Think Fast!
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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.
Landfill in a Bottle
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In this activity, learners discover how landfills affect the natural environment.
Doppler Effect
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In this activity, learners use a tuning fork to explore how the Doppler effect works.
Reaction: Yes or No?
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In this activity, learners mix ingredients in a plastic bag, and then identify three characteristics of a chemical reaction: production of heat, color change, and production of a gas.
Good Vibrations
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This lesson (on pages 15-24 of PDF) explores how sound is caused by vibrating objects. It explains that we hear by feeling vibrations passing through the air.
Drop IT!: Depth Perception
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These two activities (4th on the page) demonstrate the importance of two eyes in judging depth.
Accommodating Accommodation
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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.
Rutherford's Enlarged: A Content-Embedded Activity to Teach about Nature of Science
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This paper describes a working-model demonstration of Ernest Rutherford's 1911 experiment about the nature of atoms.
Shifting Backgrounds, Shifting Images
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In this quick activity/demonstration (5th on the page), learners explore depth perception.
Exploring Properties: Surface Area
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This hands-on activity demonstrates how a material can act differently when it's nanometer-sized.
Heavy Air
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In this activity and/or demonstration, learners illustrate visually and physically that air has weight. Learners balance two equally-inflated balloons hanging from string on a yard stick.
Toilet Model
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In this activity, PVC pipe, plastic water bottles and vinyl tubing are used to make a simple working toilet model. The model shows the role of a siphon in the flushing of a toilet.
Red, White and Blue II Demonstration
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In this chemistry demonstration, learners investigate the rule "likes dissolve likes" by combining three, immiscible liquids to create a colorful density column.
Erupting Fizz
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This is a highly visual demonstration that illustrates both the effects of density and chemical reactions.
Lifting Lemon
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In this physics demonstration, learners will be surprised when a lemon slice appears to magically levitate within a pint glass.
Marshmallow Puff Tube
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In this demonstration/activity, learners observe as a regular size marshmallow is blown through a tube made from a manila file folder.
Investigating Convection
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This experiment is designed to illustrate how fluids, including water, have the ability to flow.
Magical Match
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In this demonstration, learners will be "wowed" as three matches burn to form a triangular pyramid shape and "magically" rise off the table.
Springs and Stomachs
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In this demonstration, learners investigate mass, gravity, and acceleration by dropping a wooden bar with a balloon attached to its underside, a mass suspended from it by rubber bands, and a sharp-poi