Search Results
Showing results 181 to 200 of 260
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-346.jpg?itok=m7HqL0WC)
Accommodating Accommodation
Source Institutions
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.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-352.jpg?itok=UJI2nI1I)
Shifting Backgrounds, Shifting Images
Source Institutions
In this quick activity/demonstration (5th on the page), learners explore depth perception.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-169.jpg?itok=gFz5G0N2)
Cleaning Air with Balloons
Learners observe a simple balloon model of an electrostatic precipitator. These devices are used for pollutant recovery in cleaning industrial air pollution.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-144.jpg?itok=qvl2aHil)
Melts in Your Bag, Not in Your Hand
Source Institutions
In this activity, learners use chocolate to explore how the Sun transfers heat to the Earth through radiation.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-636.jpg?itok=rFDEdnGi)
Exploring Properties: Surface Area
Source Institutions
This hands-on activity demonstrates how a material can act differently when it's nanometer-sized.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-000-280.png?itok=MMlTwZsi)
Fruit Fly Trap
Source Institutions
Build a fruit fly trap out of a 2-liter plastic bottle and some rotten fruit! Fruit flies are easy to catch in warm weather. Once you catch some, you will be able to see their life cycle up-close.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-150.jpg?itok=8n6a8Z65)
Heavy Air
Source Institutions
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.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-132.jpg?itok=-yIyfrKD)
How it is Currently Done
Source Institutions
In this quick activity, learners observe how wind creates ocean currents.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-783.gif?itok=5RthtE_j)
Toilet Model
Source Institutions
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.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-126.jpg?itok=beaiXXb8)
Atmospheric Collisions
Source Institutions
In this activity/demonstration, learners observe what happens when two ping pong balls are suspended in the air by a hair dryer. Use this activity to demonstrate how rain drops grow by coalescence.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-495.jpg?itok=x79L8Ypr)
Red, White and Blue II Demonstration
Source Institutions
In this chemistry demonstration, learners investigate the rule "likes dissolve likes" by combining three, immiscible liquids to create a colorful density column.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-481.png?itok=OSjpHEQT)
Erupting Fizz
Source Institutions
This is a highly visual demonstration that illustrates both the effects of density and chemical reactions.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-330.jpg?itok=JlHNlusx)
Protect That BRAIN!: Mr. Egghead
Source Institutions
This activity demonstrates the importance of wearing a helmet to protect the brain. An egg is used to symbolize a head with the shell as the skull and the inside of the egg as the brain.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-000-792.jpg?itok=RTyWf6k5)
Solar System Bead Distance
Source Institutions
In this astronomy activity, learners create a model of the solar system using beads and string.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-644.png?itok=qmVQgLtS)
Loony Balloons
Source Institutions
In this activity, learners investigate how changing the center of gravity of a balloon affects how it travels. Learners fill a balloon with a little bit of water and insert into an empty balloon.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-483.png?itok=CuCKFY_y)
Lifting Lemon
Source Institutions
In this physics demonstration, learners will be surprised when a lemon slice appears to magically levitate within a pint glass.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-781.gif?itok=00bPZO0_)
Marshmallow Puff Tube
Source Institutions
In this demonstration/activity, learners observe as a regular size marshmallow is blown through a tube made from a manila file folder.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-480.png?itok=sTDy-LUn)
Magical Match
Source Institutions
In this demonstration, learners will be "wowed" as three matches burn to form a triangular pyramid shape and "magically" rise off the table.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-133.jpg?itok=p4S-94fU)
Moonlight Serenade
Source Institutions
In this activity, learners act as the Earth and observe how different angles between the Sun, Earth, and Moon affect the phases of the moon we see each month.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-308.png?itok=Nq0M-BBR)
Natural Selection of Antibiotic Resistant Bacteria
Source Institutions
In this activity (p.3-4 of PDF), learners learn about disease transmission and antibiotic resistance.