Book Review 2-07 “MAGNET”

I read this book “MAGNET”. In this book, many things are written about magnets. I like magnets. I often played with magnets when I was a child. I gathered iron sand around my house and a park. I had some questions about magnets from that time. And I could know them after I read this book.


Magnets always have the North pole and the South pole. They attract each other. I have already known it. But I didn’t know why they attract each other and attract. All things in the world have magnetic force. The magnetic forces usually turn on random directions. But the force of magnets turns on same direction. So magnets attract each
other.


The history of magnets is also introduced in this book. From the old days, the fact that there are stones attract irons was known by many people. The magnets are natural magnets. In the year about 1000, sailor used magnets for the sake of knowing direction. Today, magnets are used for various purposes. For example, the beginner’s mark of
drivers, speaker, motor and disposal of rubbish etc. There are many other ways use magnets. I didn’t know that magnets are used at waste treatment centers. Magnets are used when rubbishes were classified metals and others in there. I am becoming happy while I research about magnets. So I will introduce about magnets.


The earth is a big magnet. The earth has the North pole and the South pole. I had a question. Why the earth has two poles? It is because the inner of the earth is pulp. There are matters that be melted by high heat. And the matters are turned by rotation. The revolution is the same condition as electromagnet.


I will introduce about magnet at hand. Vegetables and fruits become sweeter after they approximate to magnets. Magnetic force affects vegetable and fruits. And Japanese bills are attracted by magnet. It is because their ink has magnetic force. This helps prevention of crime.

As you can see, magnets are essential things for us. I usually don't think about magnet. But I use magnets without knowing. I think that magnet is profound and interesting things.


Reference
Nicolas, B. (2007). MAGNETS. Melbourne: Thomson Learning Australia.

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