Magnetism
Vocabulary
Magnet Facts
Vocabulary
Electromagnets
100
What would happen if the north ends of two magnets were close together?
What is repel?
100

What causes magnetism?

  • Moving electrons generate a magnetic field.

  • When all electrons in an atom are aligned (spinning in the same direction), the atom becomes magnetic.

100
True or False: Like charges attract and unlike charges repel.
False. Like charges repel and unlike charges attract.
100
a magnet that keeps its magnetism for a long period of time.
Permanent magnet
100
True or False: An electromagnet is a permanent magnet.
What is False? An electromagnet can be turned on or off. Once the circuit is broken, the magnetism is lost.
200
If a south end of a magnet is close to a north end of a magnet, the magnets will _________.
What is attract?
200

How does electric Current Generates a Magnetic Field?

  • Flowing electrons in a wire create a spinning magnetic field

  • Magnetic fields can be turned on/off with a switch

  • Field strength can be controlled as needed

  • Looping the wire increases magnetic field strength

More loops = stronger magnetic field

200
Name four metals that magnets are attracted to.
Iron, nickel, cobalt, or nickel.
200
to push using a magnetic force.
Repel
200
True or False: An electric crane is an example of an electromagnet.
What is True?
300
True or False: All magnets have the same shape and size.
What is False?
300
A tool used to establish directions using a magnet.
compass
300
What is the world's largest magnet?
The Earth. Its magnetic fields help keep solar flares from hitting the earth.
300
to pull using a magnetic force.
attract
300
True or False: A refrigerator magnet is a permanent magnet.
What is True? Even when you take it off the refrigerator, it is still magnetic.
400
True or False: All magnets have a north and south pole.
What is True?
400
a piece of iron that becomes a magnet when an electric current passes through a coil of wire wrapped around it.
electromagnet
400
What is a real life use of an electromagnet?
Electromagnetic cranes are used to lift heavy pieces of metal and move them around. Junk yards use them to lift and move cars.
400
the area of a magnet with the strongest force.
magnetic poles
400
An electromagnet must be part of an electrical ______.
What is circuit?
500
Will a magnet attract copper, rubber, iron, or plastic?
What is iron?
500

the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other 

Friction 

500
You are testing jewelry to see if it is real gold or not. You decide to do a magnet test first. One piece attracts to the magnet but the other does not. Which piece may be real, and which one is definitely not? Explain your answer.
The one that attracts to the magnet is definitely not real gold because gold is not attracted to magnets. Only iron, cobalt, nickel, and steel are attracted to metals.
500
An object that can attract iron, nickel, cobalt, or steel objects.
magnets
500
An electromagnet is made up of what three items?
What is an iron bar (nail), battery, and a wire?
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