Electric lights will not come on unless their electrical circuit is a —

A fifth-grade class constructed this circuit. Which of these objects most likely made the light glow when connected to points X and Y?

Which of these substances conducts electricity the best?

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

What material would be safest to use as an insulator to cover electrical wires?

Copper wire is often wrapped in plastic. Plastic material is a good —

Early scientists most likely saw a discharge of electricity for the first time when observing a —

Benjamin Franklin discovered the form of energy produced by lightning. Experiments with lightning killed many people before he discovered that lightning is a form of —

A comb is rubbed with a piece of wool fabric and placed next to some scraps of paper. The paper moves toward the comb. The movement of the paper is caused by —

A bar magnet is placed on a table, and a sheet of blank paper is placed over the magnet. What could be sprinkled on the paper to show the magnetic field of the bar magnet?

To make an electromagnet, a conductor should be coiled around —

Michael Faraday showed how electric current in a wire produces —

The magnetic fields of any magnet are greatest —

Which of these correctly shows what happens when two magnets are placed side by side?

Which energy transformation most likely occurs in a steam iron?

The energy used to move most bicycles is an example of what type of energy?

Which item is designed to change electrical energy into heat energy?

Thomas Edison improved the -