Search Results
Showing results 1 to 20 of 45
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-178.png?itok=sHk61bRz)
Lean, Mean Information Machine: Using a Simple Model to Learn about Chromosomal DNA
Source Institutions
Learners observe a model of a cell and its chromosomal DNA made from a plastic egg and dental floss. Use this model to illustrate how much DNA is held in one cell.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-245.jpg?itok=nvNRUaXm)
Matter on the Move
Source Institutions
Learners observe and conduct experiments demonstrating the different properties of hot and cold materials.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-537.jpg?itok=FGJUV1YI)
Surface Area
Source Institutions
In this demonstration, learners discover that nanoparticles behave differently, in part because they have a high surface area to volume ratio.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-330.jpg?itok=ItPXDz8V)
Changing the Density of a Liquid: Adding Salt
Source Institutions
Learners see that a carrot slice sinks in fresh water and floats in saltwater.
![](/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.
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-000-000-003-327.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-000-000-003-536.jpg?itok=6ufDz7qs)
Inkjet Printer
Source Institutions
In this activity, learners investigate how inkjet printers produce tiny, precise drops of ink.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-244.jpg?itok=d3m3pfZc)
Evaporation
Source Institutions
This three-part activity consists of an activity that groups of learners develop themselves, a given procedure, and an optional demonstration.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-482.gif?itok=YW6_--D3)
Phase Changes
Source Institutions
Learners observe a sealed test tube containing a small amount of solid stearic acid.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-853.png?itok=N1HwXKwG)
Amphibian Skin
Source Institutions
In this activity, learners explore the concept of permeability to better understand why amphibians are extremely sensitive to pollution.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-808.jpg?itok=XE-2mOh6)
Glowing Pickle
Source Institutions
In this activity, high voltage is applied across a pickle to emit a yellow glow. This activity should only be conducted by skilled adults and is best suited as a demonstration.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-940.jpg?itok=oJtz0wJN)
Good Vibrations
Source Institutions
In this activity, learners experiment with their voices and noisemakers to understand the connections between vibrations and the sounds created by those vibrations.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-581.gif?itok=BUO5-R0j)
Fuel for Living Things
Source Institutions
In this activity, learners observe what happens when yeast cells are provided with a source of food (sugar). Red cabbage "juice" will serve as an indicator for the presence of carbon dioxide.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-158.jpg?itok=03KN2Vso)
Sink It
Source Institutions
Learners classify a variety of objects by their characteristics. They then design an experiment to determine which objects float or sink in water and add this characteristic to their classification.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-712.gif?itok=xAgmw_mZ)
Phantom Phlame
Source Institutions
In this trick, hold your hand over a burning candle without getting burned, by reflecting and transmitting the light of two candles. This activity is best suited as a demonstration.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-672.png?itok=655GFrPR)
Cactus Needle Phonograph
Source Institutions
Build a phonograph record player using a cactus needle, a record, LEGOs gear box, and a piece of paper! This activity uses a Pico Cricket to turn the motor.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-823.png?itok=7R3aDjyw)
How Do We Convert Mechanical Energy into Electrical Energy?
Source Institutions
In this activity, learners use a compass, powerful magnet, and copper magnet wire to build a special generator known as a dynamo.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-956.jpg?itok=itswrN12)
Current Events
Source Institutions
Learners model the ocean currents that carry hot water from the tropics to northern latitudes.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-088.jpg?itok=5dKesYKF)
Turning the Air Upside Down: Convection Current Model
Learners see convection currents in action in this highly visual demonstration. Sealed bags of colored hot or cold water are immersed in tanks of water.