Earth's magnetic field induces some degree of magnetism in most of the iron objects around you. With a compass you can see that cans of food on you pantry shelf have north and south poles. When you pass the compass from their bottoms to their tops, you can easily identify their poles. Mark the poles, either N or S. Then turn the cans upside down and note how many days it takes for the poles to reverse themselves. Explain to your friends why the poles reverse. Explain in detail what you did, how you did it, what you observed and your reasoning for why you observed what you did.

Question

Earth's magnetic field induces some degree of magnetism in most of the iron objects around you.  With a compass you can see that cans of food on you pantry shelf have north and south poles.  When you pass the compass from their bottoms to their tops, you can easily identify their poles.  Mark the poles, either N or S.  Then turn the cans upside down and note how many days it takes for the poles to reverse themselves.  Explain to your friends why the poles reverse. Explain in detail what you did, how you did it, what you observed and your reasoning for why you observed what you did.

I am so confused??