My Pals are Here! Science © 2008 Marshall Cavendish (Singapore) Private Limited.

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Presentation transcript:

My Pals are Here! Science © 2008 Marshall Cavendish (Singapore) Private Limited

A question to think about… My Pals are Here! Science © 2008 Marshall Cavendish (Singapore) Private Limited Where are magnets used?

Where are magnets used around us? My Pals are Here! Science © 2008 Marshall Cavendish (Singapore) Private Limited Magnets in telephones and speakers of hi-fi systems help produce sound. Electromagnets help to make images on television screens and computer monitors. Tiny electromagnets inside computers and video recorders aid in handling information.

Where are magnets used around us? Magnets hold messages on refrigerators and can also be used as ornaments. Electrical appliances like the washing machine and blender, contain parts that use magnets. A thin, long magnet can be found inside a rubber tube around the refrigerator door. Since the door is made of steel, the magnet helps to keep the door shut. My Pals are Here! Science © 2008 Marshall Cavendish (Singapore) Private Limited

Other uses of magnets Magnets are used in compasses to show directions as they always rest in the North- South direction. Sailors, soldiers and hikers carry compasses so that they do not get lost. My Pals are Here! Science © 2008 Marshall Cavendish (Singapore) Private Limited

Other uses of magnets Steel electromagnets are used in electronic door looks to lock and unlock doors. My Pals are Here! Science © 2008 Marshall Cavendish (Singapore) Private Limited

Other uses of magnets Cards such as this Automated Teller Machine (ATM) card use magnetic strips to store information. My Pals are Here! Science © 2008 Marshall Cavendish (Singapore) Private Limited

Other uses of magnets Some countries have a type of train, known as the maglev train, which has no wheels. The train does not touch the track due to magnetic repulsion. Hence, it can also travel much faster than ordinary trains. My Pals are Here! Science © 2008 Marshall Cavendish (Singapore) Private Limited

Other uses of magnets Powerful electromagnets are used to separate heavy iron and steel objects from other things which are thrown away. The iron and steel are recycled into other things. My Pals are Here! Science © 2008 Marshall Cavendish (Singapore) Private Limited

Other uses of magnets Magnets can be used in magnetic games as well, like the game of checkers here. My Pals are Here! Science © 2008 Marshall Cavendish (Singapore) Private Limited