5 All About Magnets

All About Magnets BY SARAH KOVATCH

《关于磁铁的一切》莎拉·科瓦奇著

Chapter 1 All Kinds of Magnets Do you have magnets in your home? You have magnets in your telephone, in your washing machine, probably in your can opener, too. Some of your toys have magnets. You may even have magnets on your refrigerator door. They may be holding up photos of you right now! Magnets are everywhere. They can move some things without touching them. They can pick up other things. What is so special about a magnet? A magnet can attract, or pull, objects toward it.

第一章各种磁铁你家里有磁铁吗? 你的电话里有磁铁，洗衣机里也有，开罐器里可能也有。 你的一些玩具有磁铁。 你甚至可能在冰箱门上贴上磁铁。 他们现在可能正举着你的照片呢!磁铁无处不在。 他们可以不用碰东西就能移动一些东西。 他们可以学习其他东西。 磁铁有什么特别之处? 磁铁可以吸引或拉物体。

A magnet will not attract just any object. The object it attracts must be made of special metals such as iron or steel. Magnets are also made of these metals. Any object that is able to be pulled to a magnet is magnetic. Objects made of rubber, paper, and plastic are not magnetic. Magnets cannot pull, or attract, them.

磁铁不会吸引任何物体。 它所吸引的物体必须由铁或钢等特殊金属制成。 磁铁也是由这些金属制成的。 任何能被磁铁吸引的物体都是有磁性的。 由橡胶、纸和塑料制成的物体不具有磁性。 磁铁不能拉或吸引它们。

Chapter 2 Push and Pull Magnets come in all shapes and sizes. They can be in the shape of a candy bar, a horseshoe, or even a circle. Magnets can be large or small. But they all share one thing. All magnets have two poles. One end of the magnet is called the north pole. The other end is called the south pole. Suppose you put two magnets next to each other. The north pole and the south pole would attract, or pull toward each other. But two north poles or two south poles would repel, or push each other away. Remember: Opposite poles attract. Like poles repel.

磁铁有各种各样的形状和大小。 它们可以是糖果条的形状，马蹄铁的形状，甚至是圆形的形状。 磁铁可大可小。 但他们都有一个共同点。 所有磁铁都有两极。 磁体的一端称为北极。 另一端被称为南极。 假设你把两块磁铁放在一起。 北极和南极会相互吸引。 但两个北极或两个南极会相互排斥，或相互推开。 记住:异性相吸。 同性相斥。

Did you know that Earth is a big magnet? That is because Earth has a lot of iron in it. The iron turns slowly inside Earth. That creates a magnetic field around Earth. All magnets have a magnetic field. This is the area around a magnet where its force pulls or pushes objects. The closer the object is to the magnet, the stronger the pull or push. The farther away the object is, the weaker the pull or push.

你知道地球是一块大磁铁吗? 这是因为地球上有很多铁。 铁在地球内部转动缓慢。 这就在地球周围形成了磁场。 所有磁铁都有磁场。 这是磁铁周围的区域，磁铁的力在这里拉或推物体。 物体离磁铁越近，拉力或推力就越大。 物体离得越远，拉力或推力就越弱。