Search Results
Showing results 21 to 40 of 293
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-848.jpg?itok=vgq6upYr)
Bicycle-Wheel Gyro
Source Institutions
In this activity, a spinning bicycle wheel resists efforts to tilt it and point the axle in a new direction.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-508.jpg?itok=q_90tPR_)
Liquid Body Armor
Source Institutions
In this activity, learners explore how nanotechnology is being used to create new types of protective fabrics.
Message in a Neuron
Source Institutions
In this activity, learners play a simple card game to learn the sequence of events in the transmission of nervous system signals.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-008.gif?itok=yKam9MlT)
Luminol Test
Source Institutions
Learners mix a solution containing luminol and copper with a fake blood solution. A chemical reaction between the luminol solution and fake blood (hydrogen peroxide) show learners a blue glow.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-785.gif?itok=oVx2aChU)
Laser Lissajous: PVC Version
Source Institutions
In this activity, learners use a laser pointer and two small rotating mirrors to create a variety of fascinating patterns, which can be easily and dramatically projected on a wall or screen.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-333.jpg?itok=LfEYC6s_)
Defining Density
Source Institutions
In this introductory demonstration and activity, learners are introduced to the concept of density as they explore a rock and a wooden block in water.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-327.jpg?itok=nd8tBZJq)
Changing the Density of an Object: Changing Shape
Source Institutions
Learners will see that changing the shape of an object, like a clay ball, that is more dense than water, can affect whether the object will sink or float.
![](/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-000-000-003-643.png?itok=xcohskkM)
Underwater Fireworks
Source Institutions
In this activity, learners investigate diffusion by creating underwater "fireworks" using food coloring, oil and water.
![](/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-000-000-003-124.jpg?itok=xmAJKBK1)
Perching Parrot
Learners explore the concepts of equilibrium and center of mass by seeing how non-symmetrical objects balance.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-370.jpg?itok=PJQsDOP7)
Dry Ice Comet
Source Institutions
In this activity, dry ice and other items are used to construct a demonstration model of a comet that illustrates the comet nucleus, coma, and tails.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-416.png?itok=eYN_p0GZ)
Dunking the Planets
Source Institutions
In this demonstration, learners compare the relative sizes and masses of scale models of the planets as represented by fruits and other foods.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-584.jpg?itok=8HHj2492)
Free Fall
Source Institutions
In this quick activity (page 1 of PDF under SciGirls Activity: Hockey), learners will use a simple physics of motion and gravity demonstration to test their predicting skills.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-668.jpg?itok=R-joBVdY)
The Electric Squeeze
Source Institutions
In this activity/demo about piezoelectricity, learners discover how some crystals produce electricity when squeezed.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-669.png?itok=W9ELo08r)
Nano Ice Cream
Source Institutions
In this activity/demo, learners discover how liquid nitrogen cools a creamy mixture at such a rapid rate that it precipitates super fine grained (nano) ice cream.
![](/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-000-000-002-094.jpg?itok=utnSeEC9)
Why Doesn’t the Ocean Freeze?
Source Institutions
In this activity, learners explore how salt water freezes in comparison to fresh water.