energy exam

Choose the correct definition of switch.

• Supplying the electrical current.

• They conduct electricity.

• It opens or closes the circuit.

• This convert electricity.

In a ______ ,electrical energy transformed into soun energy

There are two qualities of sound,

volume and timbre

• true

• false

Choose the correct name of the conductor of electricity.

• switch

• elecrical device

• wires

• power source

Sound it's

• metal

• form of energy

Materials with differet electrical charges attract each other

• same type of charge

• different type of charge

Sound travels aroud:water,ground and _____

there are...

• two electrical charges

• three electrical charges

• one electrical charge

• five electrical charges