electricity
electricity
electromagnets
magnetism
magnetism
electromagnets
electromagnets
100
What kind of materials conduct electricity?
All metals
100
What are the components necessary to light a light bulb?
A bulb, D-cell or battery, wire
100
What happens when two magnets have their south sides facing each other?
They will repel.
100
What will happen if you bring unlike or different poles of a magnet together?
They will attract.
100
What are the components of an electromagnet?
D-cell (battery), wire, switch, wire coil, core (rivet).
100

Name two ways you can change the strength of an electromagnet.

increase the number of winds around the core and increase the number or strength of the battery.

200
Describe what a switch does in an electrical circuit. Use the vocabulary words open circuit and closed circuit.
When it's closed, the electricity can flow and the light bulb will light. When it's open, the electricity can't flow and the light bulb will not light.
200

What kinds of materials are insulators?

Anything that is not metal.
200

What materials are attracted to magnets? Give one example of something that is and something that is not attracted to magnets.

200
What happens to the force of magnets as the distance between them increases?
It gets weaker
200
What does the rivet or core of an electromagnet have to be made of?
something that is attracted to magnets, like iron or steel, because it has iron in it. 
200

What is the function of the D-cell or battery in the electromagnet?

It is the source of the energy

300
Give three examples of a conductor
teacher decides
300
What is an insulator?
A material that doesn't let electricity pass through it.
300
Can a paperclip still be attracted to a magnet through certain materials? If so, which materials can a magnetic force work through?
Yes, almost all materials.
300
Linus was playing with his younger brother. He put a paperclip on one side of a piece of paper and a magnet on the other. He made the paper clip move around on the paper without touching it. Why did this happen?
Because the force of magnets works through most materials.
300
what is the function of a switch in an electromagnet?
turns it on and off.
300

What is the function of the core or rivet in the electromagnet?

It is what becomes the temporary magnet.

400
What are three examples of things that are insulators
teacher decides
400
What is the function of the wire a circuit?
It is the pathway to carry the electricity from component to component.
400
Look at the magnets your teacher has on a pencil. The bottom of the first magnet is the south pole. Name the other poles.
Refer to pencil.
400
Which of these items will stick to a magnet? 

a. a plastic cup

b. a steel key

c. a brass fastener

d. an piece of iron

a. no

b. yes

c. no

d. yes

400

What surrounds an electrical current?

a magnetic field
400
what is the function of a wire in an electromagnet?
provides a pathway for the electricity to go through. 
500
The switch on Sarah's circuit with a motor isn't working. What will happen if she puts and aluminum nail in the place the switch used to be? Why?
The motor will start spinning, because all metals conduct electricity.
500
Look at the paper your teacher has. Which of these are circuits?
500
What is a temporary magnet? Give two examples of ways to create a temporary magnet.
A temporary magnet is a magnet that is only a magnet for a short time. It is made by coming in contact with the magnetic field of a permanent magnet or with an electrical current.
500

Marcus had an aluminum nail that he was holding in a way that the magnet and the aluminum nail were touching. He tried to pick up a paperclip with the nail. Could he? Why or why not?

500
Explain how an electromagnet works.
A rivet becomes a temporary magnet that can be turned on or off. There is a magnetic field that surrounds a wire as electricity flows through it. The insulation on the outside of the wire makes it so that electricity doesn't flow through the rivet, but the magnetic force does work through the insulation. A magnetic field surrounds an electric circuit.
500

Why does the rivet or iron core in an electromagnet become a temporary magnet? Explain what happens.

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