← All categories🧪 Chemistry
Chemistry sessions start with things you can see and touch: gold, water, ice, fire, rust, oil. Then they explain what is actually happening at the level of atoms. Cut a piece of gold enough times and you reach a single atom, the smallest amount that is still gold, cut once more and it stops being gold at all. Two ingredients that each support fire on their own combine into water, which puts fire out. Rust and fire turn out to be the same chemical process running at wildly different speeds.
Six sessions, hands-on where possible: a piece of gold cut down to its last atom, an ice cube lifted off a table by a piece of wet thread, an oil refinery built out of nothing but boiling points. Balancing a chemical equation is accounting, with atoms as the currency, nothing created, nothing destroyed, only rearranged. What a kid walks away with is not a set of reaction formulas. It is the understanding that matter has rules, those rules operate at a scale too small to see, and they are simple enough to count.
- CHEM-1The Smallest Thing That Is Still Somethingstart here~18 minWhat's the smallest piece of something that still counts as that thing? Atoms, and why they're mostly empty space.
- CHEM-2Two Atoms That Decided to Stick Togetherstart here~17 minWhy do two gases combine to make a liquid? Molecules, and how bonding completely changes properties.
- CHEM-3The Atom Accountants~32 minWhere does matter go when something burns or reacts? Nowhere. Atoms rearrange, they're never created or destroyed.
- CHEM-4Fire Scientists: Slow Burns & Fast Burns~34 minWhat do rust and fire have in common? Oxidation, happening at very different speeds.
- CHEM-5The Ice Magicians~31 minWhy does salting an icy sidewalk make the ice melt? Freezing point depression, explained.
- CHEM-6Black Gold Hunters~32 minHow does oil turn into gasoline, plastic, and even geopolitics? What petroleum actually is, and where it goes.
- CHEM-7The Lemon That Lit a Light~25 minIs a battery just a little tank of pre-made electricity? No, it holds two different metals that disagree about how badly they want to give up electrons.
- CHEM-8The Chemist Who Left Blank Spaces~40 minWhy does the chemistry classroom's wall chart have the shape it does? Sort a handful of elements by how they behave until a grid appears, then see how its blank spaces let one chemist describe three elements before anyone had found them.
- CHEM-9The Juice That Tells You What Is Sour~24 minHow do you find out whether something invisible in a liquid is an acid or a base? Red cabbage juice, which turns pink around acids and blue-green around bases.
- CHEM-10The Secret Colours Inside One Pen~24 minIs a black marker actually just black? Pull the ink apart with water and paper and watch it split into every color that was hiding inside it.
- CHEM-11Melted Ice and Burnt Toast~24 minHow do you tell whether a change can be undone? Ask if it's still the same substance underneath, the real difference between a physical change and a chemical one.
- CHEM-12The Bag That Gets Cold by Itself~23 minWhy does a hand warmer get hot while an instant cold pack gets cold? Both are real chemical reactions, just running in opposite energy directions.
- CHEM-13When the Water Says Enough~24 minHow much sugar can water actually hold? More than you'd guess, and the extra comes back out as real crystals once the water cools.
- CHEM-14How to Count Things Too Small to See~25 minHow do you count something too small and too numerous to count by hand? Weigh a small sample, then scale up, the same trick chemists use for atoms.
- CHEM-15Six Arms, No Twins~25 minWhy do snowflakes have six arms, and why are no two the same? The water molecule's shape sets the six, and every flake's own trip through the cloud sets the rest.
- GEO-22The Rock Collection on Your Street~21 minIs anything on your street made of rock? Nearly all of it, and the grains in each stone tell you whether it cooled from melted rock, settled as sand or grew from sea shells.