* Magnets point towards magnetic north, not true north. The Earth's magnetic field is not perfectly aligned with its geographic poles. There is a difference between the magnetic north pole and the geographic north pole.
* Magnetic north pole wanders. The Earth's magnetic field is dynamic and constantly changing. The magnetic north pole actually moves over time, sometimes significantly.
* Magnetic field is not uniform. The Earth's magnetic field is not evenly distributed across the globe. This means the strength and direction of the magnetic field can vary depending on your location.
So, how do we know about the Earth's magnetic field?
* Observations: We've observed the behavior of compass needles and other magnetic materials for centuries, noticing their tendency to align in a specific direction.
* Scientific measurements: Scientists use instruments like magnetometers to measure the strength and direction of the Earth's magnetic field at different locations.
* Satellites: Satellites orbiting Earth provide valuable data about the global magnetic field and its changes.
In conclusion: While a compass needle points roughly towards the north, it's actually aligning with the magnetic north pole, which is not the same as true north and is constantly shifting.
