Activity- Magnetic or Not No 12. cloth No 11. balloon No 10. bingo chip Yes 9. jean button Yes 8. key Yes 7. screw Yes 6. paper clip Yes 5. spring Yes 4. magnet No 3. cardboard No 2. plastic button No 1. foam Result (magnetic or not) Prediction (magnetic or not) Object
Where does each magnet hold the greatest number of paper clips? What do all magnets have in common? Bar magnet Horseshoe magnet Circle magnet
Strong magnets move this Japanese maglev train.
magnet any material that attracts iron & materials that contain iron one part always points north
magnetism attraction of magnet for another object
lodestone magnetic rock contains mineral- magnetite
magnetic pole 1 of 2 ends of magnet strongest magnetic effect Like poles repel Unlike poles attract Remember, opposites attract!
magnetic force attraction or repulsion between magnetic poles
magnetic field area of magnetic force around magnet
magnetic field lines invisible lines that map out magnetic field around magnet spread out from 1 pole curve around magnet return to other pole
Magnets… Magnetic field lines Some planets are magnetic Opposite poles attract-similar ones do not North and south pole Magnets attract 2 poles both have different forces World is one big magnet When you break a magnet, it still works Magnets make Japanese train move Magnets have a magnetic field around them