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Magnets

Magnets. Magnet. An object that pulls certain metals towards it . Magnets. A magnet has a force. A force is a push or a pull. Magnetism. Magnetism is a force that makes a magnet able to push or pull another object. Types of Metals that are attracted…INCS. I.N.C.S. I ron N ickel C obalt

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Magnets

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  1. Magnets

  2. Magnet An object that pulls certain metals towards it.

  3. Magnets • A magnet has a force. • A force is a push or a pull.

  4. Magnetism Magnetism is a force that makes a magnet able to push or pull another object

  5. Types of Metals that are attracted…INCS I.N.C.S. Iron Nickel Cobalt Steel

  6. A rock…magnetic? . lodestone is a rock that occurs in nature and is magnetic

  7. Magnetic Field space around a magnet where the force of the magnet can still work.

  8. Magnetic Field Image From: http://www.bbc.co.uk/schools/ks3bitesize/science/images/magnetic_fields.gif

  9. Magnetic Poles . areas of the magnet where a magnet’s attraction is the strongest

  10. North and South Magnets have two ends, they are also called poles. The poles are named North and South.

  11. Attract • A magnet attracts certain metals

  12. Attract To Pull Together S N S N

  13. Repel To push apart S N N S

  14. 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

  15. Compasses This device shows direction

  16. Compasses A compass works because Earth is surrounded by a magnetic field.

  17. Compasses North on a compass is attracted to Earth’s Magnet

  18. Magnets are Everywhere Refrigerators Cars Heavy machinery

  19. North and South N N S S

  20. Repel or Attract S N N S S N S N Repel Attract

  21. Different Kinds of Magnets Horseshoe Magnet N N S S Bar Magnet

  22. Review (What kind of magnets are these? Horseshoe Magnet N N S S Bar Magnet

  23. Earth is a Magnet • Earth is like a magnet because it has melted iron (molten)deep inside

  24. Earth is a giant bar magnet

  25. Earth’s Magnetic Field Image From: http://oceanexplorer.noaa.gov/explorations/05galapagos/logs/dec22/media/magfield_600.gif

  26. Magnetic or Not

  27. Review Magnets have 2 _______. • poles Magnets attract _____________. metals What 4 types of metals do magnets attract? iron, nickel, cobalt, and steel

  28. Review Where are some places you can find magnets? • refrigerators, can openers, machinery, etc Earth is like a giant __________. magnet How does a compass work? The magnet on the compass is attracted to Earth’s magnet

  29. Review To pull together is to ______. • attract To push apart is to ______. repel Can 2 like poles pull together? No

  30. Review Can two opposite poles pull together? • yes Why is the earth like a giant magnet? is has melted iron inside What are the end points on a magnet called? poles

  31. Review What is molten? • melted iron Which object is not magnetic? steel nail, iron lock, plastic glass plastic glass Where is a magnet the strongest? at its poles

  32. Review Why does a compass always point north? • 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 What is the name of a magnetic rock? lodestone

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