Science · Level 1 · 116 words
Why a Compass Turns
Original passage © Studio AM, written for Fluency.
A compass needle is a small magnet that can turn freely. Earth also has a magnetic field. The needle moves until it lines up with that field.
One marked end points roughly toward magnetic north. Magnetic north is not exactly the same as the geographic North Pole. The difference changes with location. It also changes slowly over time because Earth's magnetic field shifts.
Nearby metal or electric current can pull a compass away from its usual direction. That is why a careful user holds it level and keeps it away from phones, magnets, and large metal objects. A compass does not know a destination. It provides one direction that a traveler can compare with a map.
Source: Written for Fluency. Original passage © Studio AM, written for Fluency.