3An electromagnet becomes a magnet when an electric current passes through an insulated wire that is wrapped around an iron core (nail).These are the properties of an electromagnet:PolarityAttractionRepulsionStrength
4PolarityMagnets and electromagnets have areas on their ends, or tops and bottoms, that are called poles.The magnetic pull or attraction is strongest at the poles.Every magnet has a North pole and a South pole.
5PolarityThe poles of magnets affect each other in the following ways:Like poles repel each other.Unlike poles attracteach other = opposites attract
6AttractionMagnets and electromagnets attract or tend to move toward each other (unlike poles) and certain types of metals (mainly iron or steel).When iron nails or steel paper clips are held near a magnet, they will move toward or be attracted to the magnet.
7RepulsionMagnets and electromagnets can repel or move away from each other if their like poles (North-North or South-South) are brought near each other.
8StrengthThe attractive strength of a magnet or electromagnet is greatest at its poles.Some magnets have a greater attraction for magnetic materials than others.The strength of the magnetic attraction of a magnet or electromagnet can be measuredby counting the number of objects,for example paper clips that a magnetcan pick up.
10Tune: The More We Get Together Tune: The More We Get Together! Did you ever see a magnet, a magnet, a magnet? Did you ever see a magnet pull this way and that? On iron and steel, its pull is unreal! Did you ever see a magnet pull this way and that? Did you ever see a magnet, a magnet, a magnet? Did you ever see a magnet pull this way and that? A magnet has action, it's called an attraction! Did you ever see a magnet pull this way and that? Did you ever see a magnet, a magnet, a magnet? Did you ever see a magnet pull this way and that? Meisha Goldish
11Distance apart when A moves Magnetic Tug of WarBetween two magnets, is the attraction stronger, is the repulsion stronger, or are the two forces the same? I predict ___________________________________________________________________PULLDistance apart when A movesPUSHTrial 1Trial 2Trial 3#s in orderMediancm.
12Distance apart when A moves PULLDistance apart when A movesPUSHTrial 1Trial 2Trial 3#s in orderMediancm.Now I think ___________________________________________.
13Like Poles Unlike Poles __________________Dear __________________Today we learned more about the properties of magnets and electromagnets. Magnets have something called polarity. When like poles face each other, the magnets ___________________. When unlike poles face each other, the magnets___________________. Look at my diagram below to understand what happens:Did you know not all ______________ is attracted to a magnet. For example, a penny does not stick to a magnet. Objects containing ___________ or ____________ are attracted to a magnet. A few examples of these objects include _____________, ______________ and ________________.A magnet is strongest at its _______________. Some magnets are stronger than others. Strength can be measured by the number of ______________ a magnet will pick up.Today I learned __________________________________________________________________________________________________________________________________________________________________________________,Like PolesUnlike Poles