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Where were magnets first found?
Magnesia
Which magnet poles attract and which repel?
Like poles repel and opposites attract
List 1 example of a ferromagnetic material
Iron, Nickel, Cobalt, Samium, alloys
How do ferromagnetic materials become magnetized?
Domains must become aligned
How can magnets lose their magnetism?
Heating, hitting, or dropping
What are Earth's two types of poles?
Geographic pole and Magnetic pole
List 2 examples of conductors.
Copper, Silver, Gold, Aluminum, Iron
List 2 examples of insulators.
What is a complete path for the flow of charge called?
Electric circuit
How can you magnetize a paperclip?
By rubbing a paperclip against a magnet so it aligns the domains
What term goes with the following definition: A stream of electrically charged particles flowing out of the sun at a very high speed
Solar wind
What makes a magnet work?
Spinning, moving electrons produce a magnetic field
What will happen if we try to put a North side of a a magnet to the North side of another magnet?
They will repel
What is the region of force surrounding a magnet (extends out in all directions)?
Magnetic field
What are the regions of the Earth’s magnetic field that is shaped by the solar wind called?
Magnetosphere
Why are auroras more common at higher latitudes?
Charged particles are more attracted toward the magnetic poles
How is electric current measured?
In amperes (amps)
How does a compass work?
A magnetized needle orients itself based on attraction to the strongest magnetic field
What are the parts of an electric circuit?
Power source, conducting wires and a switch, and a transducer
What are ferromagnetic materials? (definition)
Materials that show strong magnetic effects
What is the difference between a conductor and an insulator?
Insulator: Does NOT allow electric charge to flow
How can we increase the strength of an electromagnet?
Increase the current, increase the number of coils, replace the core with an even more ferromagnetic one
Why are electromagnets used in junkyards to lift cars instead of permanent magnets?
Electromagnets can be turned off and on, which is necessary to lift and move cars. Permanent magnets cannot be turned off and on – they are always magnetic.
Why would electrical resistance be wanted?
Because it produces heat and light - like in toasters, curling irons, and light bulbs
What is the difference betewen a temporary magnet and a permanent magnet?
Temporary magnet: Do not hold aligned domains very long
Permanent magnet: Holds the aligned domains