Question

Which of the following describe the Earth's magnetic declination? the angle between Earth's magnetic field and Earth's surface Earth's magnetic field strength at the equator the tendency for the Earth's field to reverse itself the angle between true north and north indicated by a compass

Answer 1

Magnetic declination is the angle between true north and magnetic north shown by a compass, with the compass needle aligning with Earth's magnetic field similar to that of a bar magnet.

Step-by-step explanation:

Earth's magnetic declination is the angle between true north (geographic north) and the north indicated by a compass (magnetic north). A compass needle aligns itself with the Earth's magnetic field, which resembles the magnetic field around a bar magnet, indicating the direction of this field. If a compass is used to map the magnetic field around a bar magnet, it will point away from the bar magnet's north pole and toward its south pole. This is because the north pole of a compass needle is attracted to the south magnetic pole of Earth, which is located near the geographic North Pole of Earth.

The Earth's magnetic field is dynamic; the magnetic north and geographic north are not perfectly aligned; the magnetic poles can also shift slightly over time. Just like a bar magnet, Earth's magnetic field lines point from the magnetic north pole to the magnetic south pole, which can lead to confusion since the magnetic north pole of Earth is actually a magnetic south pole when considering magnet definitions.

Answer 2

There's no such thing as "the Earth's magnetic declination", because
magnetic declination is different for each place on Earth.

It's the difference between true north and the direction a compass points.

You could say that the magnetic declination at a certain place is
the measurement of how 'wrong' a compass is at that place.