Active learning ideas
Magnetic Fields explores the invisible forces of attraction and repulsion. Students investigate how magnets interact with each other and with various materials. They learn about the North and South poles and the rule that 'like poles repel, while opposite poles attract.' This unit is a core component of the NCCA 'Energy and Forces' strand, specifically focusing on 'Magnetism and Electricity.'
Activity 01
Groups place a bar magnet under a sheet of paper and carefully sprinkle iron filings on top. They must sketch the patterns that emerge and discuss what the lines tell them about the strength of the field at the poles.
Which poles of a magnet attract each other?
Activity 02
Students rotate through stations with a variety of metals and non-metals. They must predict which are magnetic, test them, and discover that not all metals (like aluminum or copper) are attracted to magnets.
What materials are magnetic?
Activity 03
Students wear 'N' or 'S' badges. They must move around the room and, when they meet another student, they must either 'stick' together (attract) or 'push' away (repel) based on their badges.
How can we see a magnetic field?
A few notes on teaching this unit
Watch Out for These Misconceptions
All metals are magnetic.
This is the most common error. By providing aluminum foil, copper coins, and iron nails in a 'Station Rotation,' students can see for themselves that only certain metals (iron, nickel, cobalt) are magnetic, which corrects the error through direct observation.
Magnets only work when touching an object.
Students may think the force requires contact. Using a magnet to move a paperclip through a piece of card or across a desk helps them understand that magnetic fields act at a distance, which is a key concept in physics.
Methods used in this brief
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