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Published byDaniel Grant Modified over 9 years ago
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Magnets
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Magnet An object that pulls certain metals towards it.
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Magnets A magnet has a force. A force is a push or a pull.
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Magnetism Magnetism is a force that makes a magnet able to push or pull another object
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Types of Metals that are attracted…INCS I.N.C.S. Iron Nickel Cobalt Steel
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A rock…magnetic?. lodestone is a rock that occurs in nature and is magnetic
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Magnetic Field space around a magnet where the force of the magnet can still work.
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Magnetic Field Image From: http://www.bbc.co.uk/schools/ks3bitesize/science/images/magnetic_field s.gif
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Magnetic Poles. areas of the magnet where a magnet’s attraction is the strongest
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North and South Magnets have two ends, they are also called poles. The poles are named North and South.
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Attract A magnet attracts certain metals
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Attract To Pull Together S N
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Repel To push apart S N N S
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2 Types of Magnets. Temporary Magnet – an object that loses its magnetism after a short time Permanent Magnet- an object that keeps its magnetism for a long time
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Compasses This device shows direction
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Compasses A compass works because Earth is surrounded by a magnetic field.
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Compasses North on a compass is attracted to Earth’s Magnet
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Magnets are Everywhere Refrigerators Cars Heavy machinery
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North and South N N S S
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Repel or Attract S N N S S N S N Repel Attract
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Different Kinds of Magnets N N S S Bar Magnet Horseshoe Magnet
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Review (What kind of magnets are these? N N S S Bar Magnet Horseshoe Magnet
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Earth is a Magnet Earth is like a magnet because it has melted iron (molten)deep inside
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Earth is a giant bar magnet
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Earth’s Magnetic Field Image From: http://oceanexplorer.noaa.gov/explorations/05galapagos/logs/dec22/medi a/magfield_600.gif
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Magnetic or Not
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Review Magnets have 2 _______. What 4 types of metals do magnets attract? iron, nickel, cobalt, and steel poles Magnets attract _____________. metals
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Review Where are some places you can find magnets? How does a compass work? The magnet on the compass is attracted to Earth’s magnet refrigerators, can openers, machinery, etc Earth is like a giant __________. magnet
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Review To pull together is to ______. Can 2 like poles pull together? No attract To push apart is to ______. repel
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Review Can two opposite poles pull together? What are the end points on a magnet called? poles yes Why is the earth like a giant magnet? is has melted iron inside
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Review What is molten? Where is a magnet the strongest? at its poles melted iron Which object is not magnetic? steel nail, iron lock, plastic glass plastic glass
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Review Why does a compass always point north? What is the name of a magnetic rock? lodestone because its magnetic needle is attracted by the magnetic force given off by Earth’s North Pole What do we call magnets that lose their magnetism after a short time? temporary magnet
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