Search Results
Showing results 1 to 20 of 53
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-490.jpg?itok=c9Em4Unp)
Invisible Ink Demonstration
Source Institutions
In this chemistry demonstration, learners will discover that phenolphthalein is a chemical that displays different colors depending on the acidity or basicity of the environment.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-484.jpg?itok=sCXhvHtG)
The Power of Words
Source Institutions
This simple, yet surprising physics demonstration challenges preconceptions about forces, and demonstrates the strength of atmospheric pressure.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-134.jpg?itok=O8AVW1dM)
Diet Light
Source Institutions
In this quick activity, learners observe how the added sugar in a can of soda affects its density and thus, its ability to float in water.
Pencil Drop
Source Institutions
In this demonstration, learners observe as a bottle is placed on a table with wooden hoop balanced on top and a pencil balanced on top of the hoop.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-478.png?itok=4BAU6J18)
Cartesian Diver
Source Institutions
In this demonstration, learners observe the effects of density and pressure. A "diver" constructed out of a piece of straw and Blu-Tack will bob inside a bottle filled with water.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-479.png?itok=OsNzMBdR)
Amazing Marshmallows
Source Institutions
In this demonstration, learners observe the effects of air pressure. They will watch as marshmallows inside a bottle expand as a vacuum pump removes air from the bottle.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-485.png?itok=guP2shnY)
Waterproof Hanky
Source Institutions
In this physics demonstration, learners will be surprised when a handkerchief holds water in an upside-down glass.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-000-523.jpg?itok=Sp34uwDN)
Fireworks!
Source Institutions
In this chemistry lab activity, learners model the colors of fireworks by burning metallic solutions in a flame and observing the different colors produced.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-383.jpg?itok=R76CSycN)
Create Gas
Source Institutions
Learners mix vinegar and baking soda together in a bottle to create a chemical reaction. The reaction produces a gas, carbon dioxide, which inflates a balloon attached to the mouth of the bottle.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-382.jpg?itok=393ASMS2)
Egg Drop
Source Institutions
Perform this classic inertia demonstration to illustrate the transfer of potential energy to kinetic energy.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-444.gif?itok=6-9kq9fk)
Electrolysis
Source Institutions
Learners observe two joined glass tubes containing a conductive salt solution. Electrodes are passing an electric current through the water.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-581.jpg?itok=VxkAzCkQ)
Vanishing Rods
Source Institutions
This is a quick activity/demonstration that introduces learners to the concept of index of refraction. Learners place stirring rods in a jar of water and notice they can see them clearly.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-580.gif?itok=iKGOAchq)
Two Ball Bounce
Source Institutions
This is a quick, yet dramatic activity/demonstration that introduces learners to the concept of energy transfer. A small ball is placed on top of a large ball and both are dropped together.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-594.jpg?itok=uPLxnmkE)
Can You Make Ice Cream in Two Minutes?
Source Institutions
In this demonstration, learners observe how liquid nitrogen both boils and freezes ingredients to make ice cream in two minutes.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-582.jpg?itok=TLHfCbIJ)
Root Beer Float
Source Institutions
In this quick activity/demonstration about density, learners examine what happens when two cans of root beer--one diet and one regular--are placed in a large container of water.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-002.gif?itok=H9njPW-a)
Natural Buffers
Source Institutions
Learners use a universal indicator to test the amount of sodium hydroxide needed to change the pH of plain water compared with the amount needed to change the pH of gelatin.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-473.png?itok=41UeBPv4)
Egg-Citing Physics
Source Institutions
In this demonstration about momentum, use physics to distinguish between a hard-boiled egg and a raw egg without cracking them open.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-499.jpg?itok=UKN2xXz-)
Red, White and Blue I Demonstration
Source Institutions
In this chemistry demonstration, learners observe a chemical reaction that produces a colorful effect.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-472.png?itok=LeKZ-TAQ)
One In The Hand
Source Institutions
In this physics demonstration, learners are challenged to break a raw egg just by squeezing it. Learners will be shocked by their inability to complete the deceivingly simple challenge.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-128.jpg?itok=qJ7-7_k7)
Toasty Wind
Source Institutions
In this quick activity, learners use a toaster to investigate the source for the Earth's wind. Learners hold a pinwheel above a toaster to discover that rising heat causes wind.