Presentation on theme: "Learning Targets Magnets and Electricity Investigation 1 Review INVESTIGATING MAGNETS AND MATERIALS."— Presentation transcript:
Learning Targets Magnets and Electricity Investigation 1 Review INVESTIGATING MAGNETS AND MATERIALS
I can identify the kind of materials magnets stick to. Magnets stick to some metals, but not all metals. Magnets stick only to items that are steel or iron. Magnets do not stick to aluminum.
I can explain why magnets may attract or repel each other. Opposite poles of a magnet attract, or pull together, as seen in the top magnets in the picture. Like poles of a magnet repel, or push apart, such as the magnets at the bottom of the picture.
I can identify and use objects that will detect magnetic force. Compasses can be used as detectors because the needle of the compass will always point toward the magnet’s force. Other good detectors are iron filings, metal screens, and paper clips.
I can explain and demonstrate induced (temporary) magnetism. When magnetic force travels from a magnet through a metal item, the metal item can become a temporary magnet as long as it continues to touch the magnet. The nail below is a temporary magnet created by induced magnetism.
I can explain and demonstrate the relationship between magnetic force and distance. As the distance between two magnets increases, the force of magnetism decreases, and it is easier to break the force. The force is much stronger when the magnets are close together.
Time for a QUIZ! Which of these items will NOT stick to a magnet? A.Steel nail B.Paper clip C.Aluminum foil D.Penny E.A and B F.C and D
F A magnet does not stick to materials that don’t have steel or iron in them, such as a penny or aluminum foil.
If two magnets are placed end to end with the same poles touching…. A.The magnets will attract. B.The magnets will repel.
B Like poles will repel each other.
Which of these items would NOT be a good detector? A.Penny B.Compass C.Iron Filings D.Paper Clip
A A penny does not have iron or steel in it, so it could not detect a magnet.
Why does the paper clip stick to the nail? A.Force of Repulsion B.Force of Attraction C.Magnetic Field D.Induced Magnetism
D Induced magnetism can create temporary magnets from items with steel or iron, as long as the item remains in contact with the magnet.
Breaking the Force What happens to the force of magnetism as the distance between two magnets increases? A.The force gets stronger. B.The force gets weaker. C.Nothing happens to the force.
B The force is weaker when there is a greater distance between the magnets.