What Makes a Magnet Stick to Metal?

Have you ever stuck a magnet on the fridge, or watched a magnet pick up a paperclip as if by magic? There's no trick. It's science, and it's all about invisible forces and teeny-tiny particles.

The Invisible Force Field

Every magnet is surrounded by something called a magnetic field. You can't see it, but it's there, like an invisible bubble reaching out from the magnet. Anything that can be pulled by magnetism and enters that bubble feels a tug towards the magnet.

Meet the Tiny Magnets

Everything around you is made of teeny-tiny building blocks called atoms. In some materials, like iron, those atoms behave like miniature magnets, each with its own north and south end.

In a normal piece of iron, the tiny magnets point in all sorts of directions. Their pulls cancel each other out, so the iron isn't magnetic on its own. It's like a crowd of people all pulling in different directions, so nobody goes anywhere.

The Magic Moment

When you bring a magnet close to a piece of iron, something exciting happens. The magnet's field makes the tiny magnets inside the iron swing around and line up, all facing the same way, like a crowd suddenly marching in step.

Now the iron has become a magnet too, at least for a little while! The two magnets pull on each other, and stick! When you take the magnet away, the tiny magnets in the iron mostly go back to pointing every which way.

Not All Metals Are Magnetic

Here's a surprise: magnets don't stick to every metal. They only stick to a few special ones, mainly:

• Iron

• Nickel

• Cobalt

Steel sticks too, because it's mostly made of iron. Things like aluminium foil, copper coins, gold, and silver won't stick to a magnet at all. Their atoms don't line up in the same way.

Pushing and Pulling

Every magnet has two ends called poles: a north pole and a south pole. Here's the rule:

• Opposite poles attract. North and south pull together.

• Same poles repel. North and north (or south and south) push apart.

If you've ever felt two magnets shoving each other away, you've felt this rule in action!

Try This: Magnet Detective

Grab a fridge magnet and go on a hunt around your home:

1. Test different objects, like a spoon, a coin, a key, a paperclip, and a piece of foil.

2. Sort them into two piles: "sticks" and "doesn't stick."

3. Guess before you test! Were you right?

You might find that your kitchen sink and a tin can behave differently, because it depends on what they're made of. Just keep magnets away from tablets, phones, and bank cards, because they can be damaged.

Even the Earth Is a Magnet

Our whole planet is like a gigantic magnet! Deep inside, melted metal swirls around and creates a huge magnetic field. That's why a compass needle always points north, because it's a tiny magnet lining up with the Earth.

The Big Idea

A magnet sticks to metal because its invisible field lines up the tiny magnets inside things like iron, turning them into magnets too. Then the pulling begins. Next time you stick a drawing on the fridge, you'll know there's a whole invisible world at work!

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