指南针怎么做英语作文

How to Make a Compass

A compass is a useful tool for finding directions. Here's a simple way to make one at home:

You will need a magnet, a needle, a piece of cork or foam, a bowl of water, and some string.

First, stroke the needle along the magnet in one direction multiple times. This magnetizes the needle.

Next, push the magnetized needle through the cork or foam so that it floats freely.

Then, fill the bowl with water and carefully place the cork or foam with the needle on the water's surface.

The needle will align itself and point towards the north and south poles. The end that points north is usually marked.

It's important to note that this homemade compass may not be as accurate as a professional one, but it can give you a general idea of directions. With a little patience and effort, you can make your own compass and have fun exploring!