Question

because they are natural magnets, every lodestone has two poles. depending on their arrangement, lodestones can attract or repel each other.
match each pair of magnets with the type of force they will experience. you will use some answers more than once.
about 2,600 years ago, farmers in the greek city of magnesia noticed strange stones in their fields. although gray and dull, these stones did something incredible: they moved! the rocks were pulled towards the farmers’ iron tools by an invisible force. to some, this was evidence of the stones’ soul. to others, the rocks remained a mystery.
centuries later, similar stones were discovered in china. scholars named them tzu-h-shih, or “loving stones,” because of the way they “hugged” iron. in english, these remarkable rocks are called lodestones.
lodestones, like the one pictured here, are permanent magnets. this means that they continuously produce their own magnetic fields. other permanent magnets include compass needles and refrigerator magnets, although these are not found in nature.
permanent magnets can temporarily magnetize other materials. consider steel, a metal used to build skyscrapers, refrigerators, and washing machines. steel is not a permanent magnet. one steel washing machine will not be pulled towards another because neither one produces a magnetic field on its own.
however, a steel washing machine can become magnetic when it’s exposed to a permanent magnet’s field. the washing machine will lose its magnetism when the field is removed.

Explanation:

1. For the top pair (S-N and N-S): Opposite magnetic poles (N and S) attract each other.
2. For the bottom pair (N-S and S-N): Like magnetic poles (N and N, S and S) are aligned, so they repel each other.

Answer:

Top pair: Attractive force
Bottom pair: Repulsive force