GEOLOGY

Detailed explanation-1: -Magnetic field lines from a bar magnet form lines that are closed. The direction of magnetic field is taken to be outward from the North pole of the magnet and in to the South pole of the magnet. A magnetic field refers to the area surrounding a magnet where a force is exerted on certain objects.

Detailed explanation-2: -Magnets have two poles; the field lines spread out from the north pole and circle back around to the south pole.

Detailed explanation-3: -Outside the magnet, the magnetic lines of forces pass from north pole to the south pole and inside the magnet, they pass from south to the north pole.

Detailed explanation-4: -When it comes to magnets, opposites attract. This fact means that the north end of a magnet in a compass is attracted to the south magnetic pole, which lies close to the geographic north pole. Magnetic field lines outside of a permanent magnet always run from the north magnetic pole to the south magnetic pole.

Detailed explanation-5: -Properties of magnetic field lines: They never intersect each other (if they do, it means that one pole is pointing in two directions). They start from North and terminate at South, outside the magnet, and vice-versa inside.