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Magnetic Field

Magnetic Field is the invisible force around a magnet that pulls on metals and makes compass needles move.

Think of it this way

Set a fridge magnet on a table and push paper clips toward it one at a time. The clips close to the magnet snap to it fast, but the ones farther away just slide in slow. Past a certain point, the clips sit still — the pull can't reach them. That ring of reach around the magnet is its field.

Explaining magnetic field by grade level

A magnet has a force around it you cannot see. This force can push or pull on some metals. A compass has a tiny magnet inside it. That hidden force is what makes the compass needle spin and point a new way.

Projects that explore magnetic field

Soda Bottle Magnetometer and Magnetic Storms

Invisible but measurable, a magnetic field reveals itself through the things it moves. When solar storms disturb Earth's field, a hanging bar magnet inside a sand-filled soda bottle swings several degrees within hours — then slowly returns to its normal position. A small mirror on the magnet reflects a light spot onto a wall, so even a quarter-degree shift becomes visible across the room.

Medium