Circuits
Which would complete a circuit? A rubber band, a toothpick, or a metal nail?
Which would conduct electricity the best? Wood, plastic, or copper?
copper
What might cause your hair to stand up on a cold, dry day? Static electricity, chemical reactions, or magnetic forces?
static electricity
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 a the bar magnet? Salt or iron filings?
iron filings
Which form of energy is being used by a toaster that is plugged into the wall? Chemical, electrical, or solar?
electrical
Which material is a good conductor of electricity? Glass, metal, or newspaper?
metal
Which material would be a the safest to used as an insulator to cover electrical wires? Aluminum, rubber, or water?
rubber
Early scientists most likely saw a discharge of electricity for the first time when observing what? A waterfall, rainbow, or lightning storm?
Lightning storm
Which of these can most easily produce magnetic fields? Sunlight, wind, or electricity?
electricity
The energy used to move most bicycles is an example of what type of energy?
A. Electrical
B. Mechanical
C. Nuclear
B. Mechanical
Electric lights do not come on unless their circuit is a what? Open circuit, short circuit, or a closed circuit?
closed circuit
Which group of items can all be used to conduct electricity and complete a circuit?
A. rubber ball, plastic comb, nail
B. Paper clip, penny, screw
C. Pencil, eraser, spoon
B. Paper clip, penny, screw
Benjamin Franklin discovered that lightning is a form of what?
Electricity
To make an electromagnet, a conductor should be coiled around:
A. An iron nail
B. A roll of paper
C. A wooden stick
A. An iron nail
Which item is designed to change electrical energy into heat energy?
A. Hair dryer
B. Alarm clock
C. Telephone
A. Hair dryer
A class made a circuit with a battery, some wires, and a light bulb. Which item would make the light bulb glow when connected between the wire and the light bulb? A plastic straw, cotton string, or aluminum foil?
aluminum foil
Why might an electrician wear rubber gloves when working with electricity?
Rubber acts as an insulator and can help protect him from getting shocked.
Bits of paper are attracted to the surface of a balloon. What attracts the pieces of paper to the balloon?
Static electricity
Michael Faraday showed how electric current in a wire produces:
A. Molecules
B. A magnetic field
C. A vibration
B. A magnetic field
An electric motor is designed to turn electrical energy into:
A. Solar energy
B. Potential energy
C. Mechanical energy
C. Mechanical energy