A circuit that does not have any breaks in it is ______________________________ circuit.

A circuit with both wires attached to the same end of the battery is an example of __________________ circuit.

To make a bulb light up in a circuit, the circuit needs to be complete.

What can stop and start the flow of electricity in a circuit?

A switch only works in one part of a circuit.

Complete the sentence: A strong vibration causes a ______________ sound.

What unit is sound measured in?

Which part of the ear vibrates?

How does sound travel?

Which state of matter transfers the sound the best?