Electricity 5th grade

If there was a break in a circuit, which of the following materials could be placed in the gap to complete the circuit?

• Metal

• Rubber

• Glass

• Paper

A student was asked to bring items from home that would be good conductors of electricity. Which four items below should he or she bring?

• copper wires

• a paper clip

• wooden blocks

• aluminum foil

• a metal necklace

Which two examples will most likely create static electricity when rubbed together?

• Feet and carpet

• Hands and fingers

• Balloon and hair

• Branches and twigs

If the student touches a light bulb that has been on for a while, it will burn his hand. This is because —

• A. static electricity was changed into radiant energy

• B. light energy was changed into mechanical energy

• C. radiant energy was changed into electric energy

• D. electric energy was changed into heat energy

How is this electromagnet different than a permanent magnet?

• An electromagnet can be turned on and off when desired whereas a permanent magnet is always magnetic.

• An electromagnet can only pick up paperclips and a permanent magnet can pick up anything magnetic.

• A permanent magnet has a magnetic field and an electromagnet does not.

• A permanent magnet is made of plastic and an electromagnet is made of metal.

To make an electromagnet stronger, a person should do what two things?

• increase the number of coils around the nail

• decrease the number of coils around the nail

• make the coils tight and closer together

• Make the coils loose and further apart

The electrician in this picture is wearing rubber gloves for protection. The purpose of the rubber gloves is to —

• keep the electrician dry

• produce electricity

• insulate the electrician

• create an electrical circuit

The type of item tested in this experiment would be the-

• Dependent variable

• Constants in an experiment

• Hypothesis

• Independent variable

The path that is made for an electric current is called a —

• circuit

• amps

• voltage

• insulator

A science class was completing an experiment on electrical circuits. Why did the bulb go out each time the switch was opened?

• The battery was probably going flat.

• There was too much electricity flowing.

• Opening the switch broke the circuit.

• Opening the switch closed the circuit.