Now cut off about one quarter inch of the cork from one of the ends, making a small cork disk that is about one-quarter-inch tall.(If you are using a weaker magnet, such as a flat refrigerator magnet, rub the needle at least a dozen times.) Always rub the magnet in the same direction against the needle. Rub the magnet against the sewing needle at least five times.Use caution and have an adult help when you use the scissors to cut the cork and when you handle the needle.Keep the magnet away from other magnets and electronic devices, such as computers, cell phones and TV screens. Be careful when handling the magnet, especially if you are using a strong magnet, such as a rare earth magnet.Scissors for cutting the corkA wide cup, drinking glass or bowl.A magnet (It can be a flat refrigerator magnet or a more powerful magnet, such as a rare earth magnet-the most common type is made of neodymium-which can be purchased at many hardware stores.In this science activity you'll get to make your own compass, which may help you understand some of the challenges that early magnetic compass makers encountered! Magnetism can also help people navigate because Earth has a magnetic field, compasses can be made using a small magnetized bar or needle that points a certain direction (north or south) based on the field.Īlthough the phenomenon of magnetism has been known of for a couple thousand years, the first magnetic compasses used for navigation were not invented until relatively recently, approximately 1,000 years ago (sometime between A.D. This can cause amazing things to happen, such as making an object hover above the ground because it is being pushed up by the magnetic force. Magnetism is the reason two magnets will push against one another or be pulled together. People have known about magnetism for thousands of years. How well do you think it'll work? Get ready to find out! In this science activity you'll get to make your own magnetic compass. Magnetic compasses work based on Earth's magnetic field. Have you ever used a compass to help you figure out what direction you should go? These can come in handy to help you navigate your way through a field or forest while camping, for example.
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