How Does a Compass Work?

A compass helps you find directions by using a special needle that always points north.

Imagine you have a little friend who loves to dance. This friend is the needle inside the compass, and it’s very curious about the earth's magnetic field, kind of like how your friend is curious about music. The earth has its own invisible "dance floor," and the needle wants to join in. It turns and twirls until it finds the best spot on that dance floor, which happens to be pointing toward north.

Inside the compass, the needle is free to move. It’s like a toy car on wheels, it can spin around wherever it wants. But there's something special about the needle: it has its own tiny magnet inside it. The earth also has a big magnet inside it, and magnets love to talk to each other.

So when you hold up your compass, the needle feels the pull from the earth’s big magnet and turns until it lines up with north, just like how your friend always ends up facing the beat of the music!