Topic: demonstration

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Beaver dams and wildfire, a stop-motion demonstration

How do beaver dams change and improve their ecosystems and build climate resilience? This stop-motion short by ecohydrologist Emily Fairfax demonstrates how beaver dams slow down and store water in ponds, creating wet...

How to build with different mud recipes

Dirt, sand, straw, clay, and water. Mixed and packed together in different combinations, these materials can create incredibly sturdy shelters and structures. In this video from The Nito Project, artist builder Benito...

Mental Logs number sticks, a math magic trick

Ask someone to mix these Mental Logs number sticks up in any combination. Can you figure out the total in your head more quickly than they can add the numbers on a calculator? Yes. In fact, you can probably tell them ...

Disintegrating Flipbook by Andymation

How do you create a flipbook where the character is disintegrating? Add lots and lots of well-placed dots. This Disintegrating Flipbook animation tutorial from Laika stop-motion animator Andy Bailey of Andymation demo...

Electrified Pickle

"The first thing to realize is that when you pickle something you put it into a mixture of salt and vinegar. Salt contains ions, sodium ions, chloride ions, and salt solution is electrically conducting, but it's not v...

Don’t extinguish a metal fire with water

How do you extinguish burning magnesium? In this video from the Royal Institution, science presenter Steve Mould demonstrates what happens when you try to extinguish a metal fire with a CO2 fire extinguisher or water—...

How to make a self-starting siphon

To move liquid from one container to another, you may need a siphon, a bent tube with one end that's lower than the first. Suction is one way to get the liquid moving through it, but if you don't have a pump and you d...

Shattering glass with the World’s Largest Horn

How do horns amplify sound? Why are they flared at the ends? And how do airhorns work? Mark Rober wanted to find out so he spent eight months building a massive air horn... perhaps the world's largest horn. In this...

Thermal expansion sphere and ring demonstrations

If you ever had trouble twisting open a jar lid that's stuck, try running it under some hot water. When you try again, it will most likely pop open with a twist thanks to thermal expansion. Most (but not all) matter w...

How to make a flipbook

Animation is made from a series of still images that, when played quickly in succession, create the illusion of movement. This is best illustrated in the pages of a flipbook, especially a flipbook that you've drawn yo...

Cat’s Cradle: How to play with two people

Learn how to play a two-person version of Cat's Cradle, a very old analog string game, with these step-by-step instructions from YouTuber Mom's Minivan. The easy-to-follow tutorial shows three basic string shapes play...

How to make a rocket

"What's the best scientific formula for a powerful rocket with oxidizer and fuel?" In this video clip from Bang Goes The Theory Series 5, via BBC Earth Lab, we get a quick peek at the mix of chemistry and physics that...

The Meissner Effect: How to levitate a neodymium magnet

A neodymium magnet cube sits on a surface of yttrium barium copper oxide—YBa2Cu3O7, nicknamed YBCO—inside the bottom of a styrofoam cup. A small amount of liquid nitrogen is poured slowly over the YBCO. As it cools, t...

What happens to balloon animals in liquid nitrogen?

How can you fit a bunch of balloon animals into a small container? Add some liquid nitrogen into the mix, as demonstrated in this video by Real Physics Live, the YouTube channel for Texas A&M University's Department o...

A colorful Chladni pattern demonstration

Watch as Chladni patterns form on a metal plate, a teaching demonstration "spiced up" with colored sand by associate professor of physics at UNC Charlotte skullsinthestars. The video is accompanied by Prelude from Sui...

The Shoe-Tying Robot

What might five mechanical engineering students create with two motors, Arduino, and a $600 budget? How about a shoe tying machine? Winning an annual design competition with Japan's Meijo University, University of...

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....

Dressing in late 14th century armor

A video showing how to dress in and wear armor (harness) from late 14th century. The harness is a detailed reconstruction based on the effigy of the Black Prince (1330-1376) in the Canterbury Cathedral, other relevant...

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