1、你知道哪些物體上有磁鐵？
答：冰箱門、揚(yáng)聲器（喇叭）、耳機(jī)、電話、麥克風(fēng)、話筒等。
2、磁鐵根據(jù)它的形狀，分別有什么名字？
答：條形磁鐵、環(huán)形磁鐵、蹄形磁鐵、圓形磁鐵、方形磁鐵、槽形磁鐵等。
3、辨認(rèn)鐵制物品用什么方法最可靠？
答：用磁鐵吸。
4、下列物品中哪些能被磁鐵吸引？
鐵鑰匙 鐵釘鋁絲 銅電線 回形針 玻璃珠 木塊 紙片 布條 橡皮擦 塑料尺 易拉罐 罐頭盒答：鐵鑰匙 鐵釘 回形針 罐頭盒 易拉罐
5、一塊蹄形磁鐵用紙包嚴(yán)，它還有磁性嗎？為什么？
答：有，磁鐵隔著一些物體也能吸鐵。
6、磁鐵有哪些性質(zhì)？
答：磁鐵能吸鐵；磁鐵隔著一些物體也能吸鐵；磁鐵能指示南北；磁鐵同極相斥，異極相吸。
7、磁鐵為什么能指示南北？
答：地球本身就是一塊巨大的有磁性的物體，也有南北兩極。能與指南針的兩極相互作用，讓指南針總是指向南北。
8、要制作一個(gè)指南針，需要什么材料？
一塊磁鐵，一個(gè)鋼針。用手指按住鋼針的尖端，用磁鐵的磁極在鋼針上沿一個(gè)方向摩擦，重復(fù)20-30次。
9、你是怎樣制作指南針的？研究的問題：怎樣制作指南針？
準(zhǔn)備材料：鋼針、磁鐵、塑料碗、水、吹塑紙、筆制作過程：
1、用手拿著磁鐵的一端，用磁鐵的磁極在鋼針上沿一個(gè)方向摩擦20～30次。
2、如果鋼針能吸起大頭針，說明鋼針有了磁性。
3、把磁化的鋼針插在吹塑紙上，放在水中，磁針一端指南，一端指北，在吹塑紙上寫上東、南、西、北各個(gè)方向，我們的指南針就能指示方向了。
10、指南針的制作原理：
一個(gè)能夠自由轉(zhuǎn)動的磁鐵，靜止時(shí)，總是一端指南，一端指北。我們把指南的一端叫南極，用S表示，指北的一端叫北極，用N表示，指南針就是根據(jù)磁鐵指南北的性質(zhì)制成的。表示字母：東E南S西W北N 東南ES 東北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
