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Topic: atoms
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....
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...
The Genius of Marie Curie
Dr. Marie Curie transformed science and society with her discoveries. Her scientific partnership with Pierre Curie and the story of their heroic efforts that led to the discovery of polonium and radium are legendary.....
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...
Why is syrup sticky?
Water isn't sticky, and sugar on its own isn't sticky either. So why is syrup—a heated, melty combination of water and sugar—so very, very sticky? Emily Elert of MinuteEarth explains the sticky molecular structures of...
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...
Welding in Space
On June 3, 1965, after America's first spacewalk was complete, the two Gemini IV astronauts, spacewalker Edward H. White II and command pilot James A. McDivitt, had trouble getting the hatch closed. They managed to, a...
A Sketchy History Of Pencil Lead
When fifth-graders at Green Acres Elementary in Lebanon, Oregon asked the NPR Skunk Bear team how pencil lead was made, they looked into it... way into it. From the start of the universe (with a shout out to Carl Saga...
How to Design a Particle Accelerator
What is a particle accelerator and how would you go about designing one? We've heard of the Large Hadron Collider at CERN, but what of the tens of thousands of other accelerators being used in science and medicine? ...
How To Make Glow-In-The-Dark Slime! – Gross Science
Phosphors, polymer chains, and photons! In this episode of Gross Science, Anna Rothschild shows us how to easily make glow-in-the-dark slime using common household items: Hot water, borax, glow-in-the-dark paint, and ...
How Do Sharks and Rays Use Electricity to Find Hidden Prey?
Imagine if you had six traditional senses instead of five: Sound, sight, touch, smell, taste and... What might you pick? Echolocation? Magnetoreception? How about electroreception? Sharks, rays, skates and sawfish...
Explore the Science Behind Fireworks—and the Galaxy
When you watch fireworks burst with color, you're seeing examples of how stars and galaxies work: Blues from copper, yellows from sodium, bright whites from aluminum, barium greens, and reds made from strontium... The...
The science of static electricity – TED Ed
What is static electricity? Why do we get a tiny spark when we've walked across a carpet and touched a doorknob? Or have you ever pet a cat and then picked up something metal, like a spoon to stir up cat food? Zap! (A...
The Electric Sausage: A static electricity demonstration
Perhaps you've experimented with static electricity by using a balloon, paper clippings, your hair, a pencil, a plastic bag, or a Van de Graaff Generator... but have you ever used a sausage to see static electricity i...
How Small Is An Atom?
Using a strand of hair, your fist, rice and sand grains, as well as the room you're sitting in right now (assuming it's not a huge gymnasium), let's try to visualize the basic building block of everything around us: A...
The Ring of Truth: Two Hydrogen Atoms & One Oxygen Atom
Possibly the most well-known scientific formula on the planet, H2O is one of those terms that we see around all the time. We know that H2O means water, and that a water molecule is composed of two hydrogen (H) atoms &...
Eva Szasz’s Cosmic Zoom (1968)
From director Eva Szasz and the National Film Board of Canada, Cosmic Zoom (1968) is a wordless journey that attempts to demonstrate the scale of the universe. Beginning with a boy boating on the Ottawa River, we trav...
The Ring of Truth: Noodles & the principle of halving
Chef Kin Jing Mark demonstrates how to make super-thin noodles and helps introduce the principle of halving in this clip from the PBS miniseries The Ring of Truth: An Inquiry Into How We Know What We Know - Atoms (198...
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