1. Prepare the materials and tools needed to make a simple compass. See the figure below.
2. Rub the magnet back and forth on the embroidery needle several times. See the figure below.
3. After rubbing, insert the needle into the cut paper. See the figure below.
4. Write the north-south direction on paper. See the figure below.
Put the paper in a bowl filled with water, and the compass is made. See the figure below.
Compass, called Sina in ancient times, is mainly composed of magnetic needles installed on the shaft. Under the action of natural geomagnetic field, the magnetic needle can rotate freely and keep in the tangential direction of magnetic meridian. The south pole of the magnetic needle points to the geographical south pole, so this property can be used to identify the direction.
The advantages of doing manual work:
1. Manual activities are a way for us to explore knowledge and promote brain development. The more we do, the more we can learn.
2. Handwork can bring fine movements to children, that is, the unity and coordination of thinking consciousness and muscles. From rough manual to fine manual, children's hands-on ability can be improved step by step, and children can control their movements more accurately by doing manual work.
3. Not only physiological function, but also physical activity is more important to people's comprehensive ability and mental health. Manual activities can cultivate children's observation ability, creativity and imagination. Children will gradually develop the habit of carefully observing things around them in the process of hands-on, and grasp the characteristics of things more and more accurately.