Class+1-+Magnets+2


 * Class 1- Magnets 2 **

//**Made By David, Dylan, Ian, Nayeem **//

//**History:**// The Ancient Greeks and early Chinese knew about lodestone. They believed that these stones were strange and magical. In the year 1000, the Chinese discovered that a needle stroked on a lodestone will point north. In 1820, a man named Hans Christan Oersted demonstrated that magnetism is related to electricity by bringing a magnet up to a electric current wire.

//**Advantages and Disadvantages:**// Magnets can power motors. Also, they keep refrigerator doors closed. Some disadvantages are magnets will lose their magnetism if they are heated. They will also lose their magnetism if they are thrown or beaten against a wall or floor.

**//Uses For Magnets://** To make sure your water heater doesn't corrode, a magnet can be put on top of the fresh water intake pipe to attract the damaging metallic calcium particles before they get inside. Magnets can repel sharks. How they repel them is sharks have a sixth sense called electro-reception. The magnetic force underwater disrupts their field, making them go away swiftly.

**//Personal Experience://** David's finger was crushed between two magnets. David put a magnet down his shirt and got stuck to a refrigerator door. When Ian was nine, his aunt made him take a picture with Cinderella and now its hanging on a refrigerator thanks to a magnet. When Nayeem was little, his cousin took a picture of him, and now it is on his door.

//**Citations:**// Www.thisoldhouse.com. N.p., n.d. Web. 20 Feb. 2013.

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Www.howstuffworks.com. N.p., n.d. Web. 20 Feb. 2013.

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Www.howmagnetswork.com. N.p., n.d. Web. 20 Feb. 2013.

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http://teachertube.com/viewVideo.php?title=Magnets&video_id=28000

http://www.google.com/search?q=magnets&hl=en&safe=active&source=lnms&tbm=isch&sa=X&ei=DSguUdzjD4W29QTuwIAQ&ved=0CAcQ_AUoAQ&biw=1024&bih=497&surl=1

http://www.google.com/search?q=magnets&hl=en&safe=active&source=lnms&tbm=isch&sa=X&ei=DSguUdzjD4W29QTuwIAQ&ved=0CAcQ_AUoAQ&biw=1024&bih=497&surl=1#hl=en&safe=active&tbm=isch&sa=1&q=bar+magnet&oq=bar+magnet&gs_l=img.3..0l9j0i5.43101.52000.0.52255.16.16.0.0.0.0.175.1869.5j11.16.0...0.0...1c.1.4.img.d0cdo19yICA&bav=on.2,or.r_gc.r_pw.r_qf.&bvm=bv.42965579,d.eWU&fp=21bb6976ce6b0541&biw=1024&bih=497>

//**Videos and Pretty Pictures: **//

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