Why do magnets stick to the fridge?
The short answer first, then the real reason — and a version for younger kids. Guess before you scroll to make it stick.
✅ Magnets pull on iron hidden inside the door
But why?
Inside iron are billions of tiny magnetic zones called domains, like mini compasses pointing every which way. When a strong magnet comes close, the domains swing around to line up with it — and the iron briefly becomes a magnet too, snapping toward it. Only a few metals can do this: iron, nickel, and cobalt.
🧒 For younger kids: Fridge doors have iron inside. Magnets and iron are best friends — cling!
🤯 Wow fact: Cut a magnet in half and you get two smaller magnets — each with its own north and south. Forever!
Good guesses kids make
“Magnets are sticky like glue” — Magnets aren’t sticky at all — they can even pull through air, paper, or a thin table!
“The fridge is cold, and cold makes things stick” — Cold isn’t the trick — a magnet sticks just as well to a warm iron spoon.
“Magnets suction onto smooth surfaces” — Suction cups need air pressure to work. Magnets don’t need air at all!
More science at home why questions
- Why does ice float on water?
- Why are soap bubbles round?
- Why do rainbows appear after rain?
- Why is it colder in winter?
- Why is glass see-through?