马格尼斯很希望有一个指南针,这样他出探险时就不会迷路了。外福来提议:不如我们动手做一个吧!你需要:针,条形磁铁,软木塞,一盆水,曲别针,塑料卡片,剪刀,记号笔,指南针。第一步:把塑料卡片剪成圆形,贴在水盆的盆底。第二步:将针放在条形磁铁N极上摩擦十次左右(注意:一定要朝同一个方向摩擦)。第三步:将针拿到曲别针附近,确认它是否变成了磁铁。 Magness hoped for a compass, so he would not get lost while exploring. Fortune to offer: as we do it! You need: needles, bar magnets, corks, a pot of water, paper clips, plastic cards, scissors, markers, compasses. The first step: the plastic card cut into circular, affixed to the basin bottom. The second step: the needle on the N-bar magnet friction ten times (Note: be sure to rub in the same direction). The third step: take the needle near the paperclip to confirm whether it has become a magnet.