Copyright © 2012 InteractiveScienceLessons.com Do: Dangled a paper clip near a magnet. See: The magnet attracted the paper clip. What ’ s Happening: Magnetism.

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Copyright © 2012 InteractiveScienceLessons.com Do: Dangled a paper clip near a magnet. See: The magnet attracted the paper clip. What ’ s Happening: Magnetism is the force of attraction and repulsion between two objects or materials. Read p. ¶ together Interactive Notes: Magnetism

Copyright © 2012 InteractiveScienceLessons.com Do: Dragged a magnet 30 times over newspaper, aluminum, & steel wool. Checked with compass. See: The compass did not respond to newspaper or aluminum. It did to iron. What ’ s Happening: Some things can be magnetized, some cannot. Each iron atom in the wool has its own north and south pole, called the domain. The more these domains line up the same way, the stronger the current. Read p. ¶ together Before After

Copyright © 2012 InteractiveScienceLessons.com Do: Placed a bar magnet in the holder. See: It lined up with earth ’ s magnetic poles. It also attracted and repelled other magnets. What ’ s Happening: Like poles (n/n, s/s) repel, and opposites (n/s, s/n) attract. Earth is a giant (but weak) magnet, mostly as a result of the churning magma in the interior.

Copyright © 2012 InteractiveScienceLessons.com Do: Covered a bar magnet with a sheet of paper and sprinkled on iron filings. See: The filings formed a pattern of loops, leaving one part of the magnet and entering another. What ’ s Happening: Bar magnets have lines of force looping out and back in. These make up it ’ s invisible magnetic field. The poles are strongest and the middle is weakest.

Copyright © 2012 InteractiveScienceLessons.com Clean Up Person 1 Put paper clip in box Put magnet in box (leave other one clamped) Person 2 Throw steel wool away; get another piece Put pieces of newspaper & foil in box Person 3 Count 4 new note sheets Person 4 Slide iron filings back into baggie