A magnet is something that can attract metal or another magnet. A magnet can also repel another magnet
100
A compass is a magnetic navigational device that points towards magnetic north.
What is a compass?
100
Magnetic fields are induced by Solenoid.
What induces a magnetic field?
100
A magnet made from electricity is an electromagnet.
What is an electromagnet?
100
When like poles are put together, they repel. When different poles are put together, they attract. North and South attract, North and North repel, South and South repel.
Explain how to have the poles of a magnet attract or repel another magnet.
200
Iron
What is the best magnetic substance? Hint: more of this is an electro magnetic core makes it stronger.
200
Magnets are the key component in compasses.
What are the key components in compasses?
200
A magnetic field is the area in which a magnet or piece of metal feels the force of another.
What is a magnetic field?
200
The best use of an electromagnet is when we can turn it on and off such as toasters, doorbells or any job needing a force on command that needs an electromagnet.
What is the best use of an electromagnet?
200
A current in a wire induces a magnetic force.
What induces a magnetic force?
300
Magnets work by spinning electrons that cause magnetism.
How do magnets work?
300
Compass needles follow the magnetic field lines of a magnet.
Compass needles follow what in a magnet?
300
See drawings
Draw the magnetic field lines for magnets that attract
300
The second best use of an electromagnet is we can control how much force we need by increasing or decreasing the electricity.
What is the second best use of an electromagnet?
300
The strength of the force between two magnets increases as magnets move farther apart.
Does the strength between magnets increase or decrease as the magnets move apart?
400
Magnets are used in Electric motors, Electric generators, and Electromagnets.
What are magnets used in?
400
A compass in Hudson Bay, Canada points towards magnetic north.
Where does a compass point in Hudson Bay, Canada?
400
See the drawings
Draw the magnetic field lines for magnets that repel.
400
Increase electricity: more batteries or stronger battery
Increase number of coils: actually adds electricity, too.
Add iron to the core: the iron amplifies the electromagnetic field.
What are the ways to strengthen an electromagnet?
400
In an electric generator, the wires spin to create a current. The current transfers mechanical energy into electric energy.
Describe an electric generator and explain how it works.
500
Permanent magnets and temporary magnets are the two types of magnets.
Permanent magnets are magnets that retain their magnetism and do not need to be “recharged.” Lodestone and magnetite are the only two permanent magnetic substances.
Temporary magnets are magnets that occur when near a permanent magnet, but loses its magnetism away from the permanent magnet; many metals can be temporary magnets.
What are the two types of magnets and how does each type work?
500
The north pole of a magnet or compass points towards geographic north and magnetic south.
The north pole of a magnet or compass points in what direction?
500
The rules for magnetic fields are
1. Drawn from North pole to south pole
2. Closer or more arrows indicates a stronger field
3. Any magnet will react in a magnetic field
4. Every magnet creates a magnetic field
What are the rules for magnetic fields?
500
Wrap insulated copper wire around an iron core, such as a nail. Attach a battery to the wire, an electric current will begin to flow and the iron core will become magnetized. When disconnected, the iron core will loose its magnetism.
How would you make an electromagnet?
500
In an electric motor, the electric current runs through the coils. The coil of wire spins changing electric energy into mechanical energy.
Describe an electric motor and explain how it works.