制作时间:5分钟制作难度:★★★☆☆想象力指数:★☆☆☆☆指南针的发明是中国劳动人民在长期的实践中对物体磁性认识的结果。由于生产劳动,人们接触了磁铁矿。经过多方面的实验和研究,特别是航海事业和外贸的兴起扩大下,终于发明了实用的指南针。宋代杰出的科学家沈括在《梦溪笔谈》中,总 Production time: 5 minutes Production difficulty: ★ ★ ★ ☆ ☆ Imagination index: ★ ☆ ☆ ☆ ☆ The invention of the compass is the result of the magnetic understanding of the object by Chinese working people in the long-term practice. Due to productive labor, people have come into contact with magnetite. After many experiments and studies, especially the rise and rise of navigation and foreign trade, a practical compass was finally invented. Shen Kuo outstanding scientist in the “Meng Xi Bi Tan”, the total