Question 12
In this model, cut out a picture of the Earth and put a bar magnet beneath it, with its S pole facing magnetic north. Seal iron filings in a large transparent zipper bag, then tape its corners to a flat surface over the Earth picture. Wear safety goggles; keep the bag securely sealed because iron filings can injure eyes or lungs. Do not put the compass near the bar magnet when finding magnetic north.
What is an analogy? Is this investigation a good analogy to show the magnetic field of the Earth?
What is an analogy? Is this investigation a good analogy to show the magnetic field of the Earth?
