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During a lesson on magnets, Nora's physics teacher explained that some materials are made up of microscopic areas called domains, which act like tiny magnets. If these domains align, the whole object is magnetized. If they point in random directions, their forces cancel out. Nora pondered whether temperature could affect a magnet's domains and overall strength. Since heat increases particles' random movement, she reasoned that heating a magnet would randomize its domains and reduce its magnetism. Nora put a magnet in the freezer for 30 minutes. Then she held it above a pile of paper clips and counted the clips the magnet picked up. She then left the magnet at room temperature for 30 minutes and repeated these steps. Finally, she submerged the magnet in simmering water for 30 minutes and repeated the procedure. When she compared her results, Nora found that the magnet picked up the fewest paper clips when hot and the most when cold. She deduced that higher temperatures make magnets weaker.