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Topic: experiments
Use a 9-volt battery to break water into its elemental components
In the 1987 miniseries The Ring of Truth: An Inquiry into How We Know What We Know, Philip Morrison proves that a water molecule is composed of two hydrogen (H) atoms & one oxygen (O) atom with a simple demonstration....
Sugar Rainbow, an easy density experiment
We've tried stacking rainbow layers before... but what if we only have water, sugar, and food coloring or coloring tablets to experiment with? Check out this Sugar Rainbow experiment, an easy way to learn about densit...
How to collect black sand with a magnet
If you're ever at a beach with some black sand in the mix, run a magnet through the sand to see if the black sand sticks. Exploratorium educator Ken Finn demonstrates this experiment with a magnet and a plastic cup at...
The Coupled Pendulum, a physics demonstration
See the simple laws of physics at work: Two pendulums swing on a string, transferring energy from one to the other and back again. This demonstration by MarkHacks, made with cardboard, screw hooks, tape, string, and t...
How To Capture A Scent, an easy science experiment
If you've ever wanted to capture your favorite smell—a rose, cinnamon, a pine tree, a campfire—this easy experiment might be able to help. From Science Friday: Aha! Here's how to capture a scent. With the help of some...
Speed up geologic time with a DIY squeeze box
Build. Observe. Play in the sand and dirt. Making your own easy-to-build squeeze box is fun for lots of different reasons, including educational ones. This Science Snacks video with Eric Muller from The Exploratorium ...
Salt crystal snowflakes, DIY candy canes, & more holiday science projects
If you're looking for a few DIY winter science activities for the holidays, these Selection Box Science videos by The Big Bang UK Young Scientists & Engineers Fair are fun and festive options. Greg Foot demonstrates a...
How to make an Amazing 9 Layer Density Tower
Water is less dense than honey. Rubbing alcohol is less dense than water. Poured carefully on top of each other, from heaviest to lightest, they can create distinct layers. Add more liquids of different densities, suc...
Surface tension and The Cheerios Effect
Ever notice how cereal clumps up in your bowl, or how cereal sticks to the edges of the bowl? Bubbles in beverages do the same thing. You've probably seen this surface tension and buoyancy at work, but did you know th...
A fidget spinner in space
Fidget spinners are everywhere... including the International Space Station. Watch as NASA astronauts Randy Bresnik and Mark T. Vande Hei, ESA astronaut Paolo Nespoli, and NASA astronaut in training Joseph M. Acaba sp...
Simplified blower and furnace experiments – Primitive Technology
In an attempt to streamline his previous blower and furnace design, and to make it easier to replicate, Primitive Technology builds a simplified blower from sticks, rope and mud. He then tests it with three charcoal-f...
How To Make Fake Poo, a mini psychology experiment
Shock your children by taking a taste of a repulsive poo! Then, by following our recipe, explore what it is that makes us feel emotions like disgust. Through this activity, Dwain and Sahara learn how our emotions a...
How to make a Hollow Mask Illusion
How do we perceive faces? With some balloons, newspaper, some paste for paper mâché, and paints, you can create a hollow mask that appears to follow you as you move back and forth around the room. Rachel and her child...
The scientist that grows ‘identical twin snowflakes’
Snow crystals form when humid air is cooled to the point that molecules of water vapor start sticking to each other. In the clouds, crystals usually start forming around a tiny microscopic dust particle, but if the wa...
Calculating Pi (π) with Darts
Can you calculate Pi (π) by throwing darts at a square and circle target as randomly as possible? Physics Girl's Dianna Cowern and Veritasium's Derek Muller attempt the challenge, and when "randomly" doesn't happen, t...
Down to Earth: 28 pairs of shoes by artist Anna Vasof
From architect and media artist Anna Vasof, Down to Earth (2014) is a short video about 28 pairs of specially-made shoes that feature stamps, brooms, books, umbrellas, drums, and more. The objects change the function ...
What can you do with a large neodymium magnet?
Neodymium magnets are really strong. The larger they get, the more careful you need to be to avoid being pinched or struck from the force of their attraction. This video from Magnetic Games cautiously explores what ca...
The Dodder Vine Sniffs Out Its Prey
From PBS Nature, watch as researchers Consuelo M. De Moraes and Mark Mesker conduct a series of experiments to find out if the dodder vine (Cuscuta pentagona), a parasitic plant that depends on a host plant to provide...
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