North magnetic pole

Definition

The North Magnetic Pole is the point on Earth's surface where the planet's magnetic field points vertically downwards. It is not fixed and moves due to changes in Earth's magnetic field.

5 Must Know Facts For Your Next Test

1. The North Magnetic Pole is different from the geographic North Pole.
2. It is currently located in the Arctic Ocean but moves over time due to shifts in Earth's core.
3. Compasses point towards the North Magnetic Pole, not the geographic North Pole.
4. The movement of the North Magnetic Pole can affect navigation systems, especially for aviation and maritime operations.
5. Earth's magnetic field, including its poles, is generated by movements within its liquid outer core composed mainly of iron and nickel.

Review Questions

• What is the difference between the North Magnetic Pole and the geographic North Pole?
• Why does the location of the North Magnetic Pole change over time?
• How does the movement of the North Magnetic Pole impact navigation systems?

Related terms

Geographic North Pole: The point in the Northern Hemisphere where Earth's axis of rotation meets its surface. It remains relatively constant compared to the moving magnetic poles.

Magnetic Declination: The angle between magnetic north (the direction a compass needle points) and true north (geographic north). This angle varies depending on your location on Earth.

Geomagnetic Reversal: A change in Earth's magnetic field such that positions of magnetic north and magnetic south are interchanged. These reversals have occurred numerous times throughout Earth's history.