Share Review Unit 6 Grade 4
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What do we call a material that allows electricity to flow through it easily?
Conductor
What do we call a material that does NOT allow electricity to flow through it?
Insulator
Name a common metal used in wires because it is an excellent conductor.
Copper
Is rubber an electrical conductor or an insulator?
Insulator
What is the purpose of a switch in a circuit?
To open or close the circuit (control the flow of electricity).
If a circuit has a gap or a broken wire, it is called an ________ circuit.
Open
What component in a circuit provides the electrical energy?
Battery (or Cell)
In a series circuit, if you add more bulbs, will they get brighter or dimmer?
Dimmer
What is the thin wire inside a lightbulb that glows when heated called?
Filament
Why is the outside of an electrical plug made of plastic?
To act as an insulator and prevent electric shocks.
Does pure distilled water conduct electricity well?
No (It is a poor conductor).
Why does salt water conduct electricity better than fresh water?
It contains dissolved ions that carry the electric charge.
What happens to the other bulbs in a series circuit if one bulb breaks?
They all go out.
Name the three essential parts of a simple circuit.
Power source, wires (pathway), and a load (e.g., a bulb).
Is gold a conductor or an insulator?
Conductor
What is a "closed circuit"?
A complete loop that allows electricity to flow continuously.
