1、你知道哪些物体上有磁铁？
答：冰箱门、扬声器（喇叭）、耳机、电话、麦克风、话筒等。
2、磁铁根据它的形状，分别有什么名字？
答：条形磁铁、环形磁铁、蹄形磁铁、圆形磁铁、方形磁铁、槽形磁铁等。
3、辨认铁制物品用什么方法最可靠？
答：用磁铁吸。
4、下列物品中哪些能被磁铁吸引？
铁钥匙 铁钉铝丝 铜电线 回形针 玻璃珠 木块 纸片 布条 橡皮擦 塑料尺 易拉罐 罐头盒答：铁钥匙 铁钉 回形针 罐头盒 易拉罐
5、一块蹄形磁铁用纸包严，它还有磁性吗？为什么？
答：有，磁铁隔着一些物体也能吸铁。
6、磁铁有哪些性质？
答：磁铁能吸铁；磁铁隔着一些物体也能吸铁；磁铁能指示南北；磁铁同极相斥，异极相吸。
7、磁铁为什么能指示南北？
答：地球本身就是一块巨大的有磁性的物体，也有南北两极。能与指南针的两极相互作用，让指南针总是指向南北。
8、要制作一个指南针，需要什么材料？
一块磁铁，一个钢针。用手指按住钢针的尖端，用磁铁的磁极在钢针上沿一个方向摩擦，重复20-30次。
9、你是怎样制作指南针的？研究的问题：怎样制作指南针？
准备材料：钢针、磁铁、塑料碗、水、吹塑纸、笔制作过程：
1、用手拿着磁铁的一端，用磁铁的磁极在钢针上沿一个方向摩擦20～30次。
2、如果钢针能吸起大头针，说明钢针有了磁性。
3、把磁化的钢针插在吹塑纸上，放在水中，磁针一端指南，一端指北，在吹塑纸上写上东、南、西、北各个方向，我们的指南针就能指示方向了。
10、指南针的制作原理：
一个能够自由转动的磁铁，静止时，总是一端指南，一端指北。我们把指南的一端叫南极，用S表示，指北的一端叫北极，用N表示，指南针就是根据磁铁指南北的性质制成的。表示字母：东E南S西W北N 东南ES 东北EN 西南WS 西北WN
1. Do you know which objects have magnets?
Answer: refrigerator door, speaker (speaker), earphone, telephone, microphone, microphone, etc.
2. What are the names of magnets according to their shape?
Answer: bar magnet, ring magnet, shoe magnet, round magnet, square magnet, slot magnet, etc.
3. What is the most reliable way to identify iron objects?
Answer: use a magnet to suck.
4. Which of the following items can be attracted by a magnet?
Iron key, iron nail, aluminum wire, copper wire, paper clip, glass bead, wood block, paper piece, cloth strip, eraser, plastic ruler, cans and cans a: iron key, iron nail, paper clip, cans and cans
5. A shoe magnet is wrapped in paper. Is it still magnetic? Why?
A: Yes, magnets can absorb iron through some objects.
6. What are the properties of magnets?
A: magnets can absorb iron; Magnets can also absorb iron through some objects; Magnets can indicate north and South; Magnets repel each other at the same pole and attract each other at different poles.
7. Why can a magnet indicate north and south?
A: the earth itself is a huge magnetic object with North and south poles. It can interact with the two poles of the compass so that the compass always points north and south.
8. What material is needed to make a compass?
A magnet, a steel needle. Press the tip of the steel needle with your fingers, rub the magnetic pole of the magnet on the steel needle in one direction, and repeat 20-30 times.
9. How do you make a compass? Research question: how to make a compass?
Preparation materials: steel needle, magnet, plastic bowl, water, blow molding paper and pen manufacturing process:
1. Hold one end of the magnet by hand and rub the magnetic pole of the magnet on the steel needle 20 ~ 30 times in one direction.
2. If the steel needle can suck up the pin, it means that the steel needle has magnetism.
3. Insert the magnetized steel needle into the blow molding paper and put it in the water. One end of the magnetic needle points to the north. Write the directions of East, South, West and North on the blow molding paper, and our compass can indicate the direction.
10. Manufacturing principle of Compass:
A magnet that can rotate freely, when stationary, always points to the north at one end. We call one end of the guide the south pole, represented by s, and the north end the north pole, represented by N. the compass is made according to the North-South nature of the magnet. Indicating letter: East e South s West W North n southeast es northeast en southwest WS northwest WN
