Are small magnets stronger than big magnets?
Magnetic attraction In small teams students use magnets to sort out a mix of magnetic and non-magnetic items such as pins, paper-clips, items made of copper, items made of brass, items made of plastic or items made of wood. Teams combine their results and look for patterns in the type of materials that are attracted by magnets and those that are not attracted. Individually, students draw those materials which are magnetic and those which are not. Students are given a new set of materials. They predict which will be attracted to a magnet and which will not. They test their predictions and record their results. What can patterns tell us about magnets? Caution: wrap the magnets in plastic wrap so that iron filings can be removed easily. Ensure proper care. Working in small teams, students use a shaker to sprinkle iron filings on a piece of paper placed on top of a magnet. Students draw on a separate prepared diagram or make digital images of the pattern made by the iron filings and compar
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