Show:
Conductor
Magnetism
Resistor
Insulator
Electromagnet
100
When two charges have different electric charges.
What is pull toward each other.
100
Electric current is the flow of
What is negative charges through matter.
100
Electric wore is coated with plastic or rubber because these materials are.
What are good resistors.
100
Electric current passes easily through
What is a conductor.
100
Every time you turn on a light you
What is close an open circuit.
200
When you turn off one lamp, all the lights in the room go off. The appliances are connected to what kind of circuit?
What is a series circuit.
200
If you connect too many appliances to one circuit, the wires can
What is overheat and cause a fire.
200
You hold the south poles of two magnets together. They will
What is repel each other.
200
A magnet's force is strongest at its
What are poles.
200
Most electric generators make electricity using
What are a magnet and an energy source.
300
The invention of the compass showed that the Earth is like a giant
What is a magnet.
300
What is created when electric current flows through a wire?
What is an electromagnet.
300
When you rub two balloons together, what can move from one balloon to the other?
What is negative electric charges?
300
Electric current flows through a circuit when it is
What is closed.
300
If you plug too many appliances into an outlet it can cause
What is an overload.
400
The northern lights are caused by
What is the Earth's magnetic field.
400
A machine that produces electricity is
What is a generator.
400
How do electromagnets make electric power?
What is by moving magnets through coiled wire.
400
Why do you feel a shock when you walk across a carpet and turn on a light switch?
What is negative electric charges jump from you to the switch.
400
If you sprinkle tiny pieces of iron over a magnet, the pattern formed shows a
What is a magnetic field.
500
As you rub a balloon on your sleeve, it picks up
What is a negative electric charge.
500
An electromagnet is formed when what flows through a wire coil.
What is electric current.
500
Electric current can be generated by
What is moving a magnet through a coiled wire.
500
Current flows through an electric circuit as long as the circuit is
What is closed.
500
I walk across a carpet, reach out and touch the light switch and I get a shock. Why?
What is negative electric charges jump from me to the light switch.