Circuits
Conductors & Insulators
Static Electricity
Electromagnetism
Energy Transformations
100
Which of these best completes the circuit? a. Rubber band b. Metal nail c. Leather shoelace d. Wooden toothpick
What is a metal nail?
100
Which of these substances conducts electricity the best? a. Wood b. Brick c. Copper d. Plastic
What is copper?
100
Early scientists most likely saw a discharge of electricity for the first time when observing a — a. waterfall b. rainbow c. lightning storm d. volcano erupting
What is a lightning storm?
100
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? a. Salt b. Iron filings c. Sand d. Soil
What is iron fillings?
100
The energy used to move most bicycles is an example of what type of energy? a. Electrical b. Mechanical c. Chemical d. Nuclear
What is mechanical?
200
Which of these materials is a good conductor of electricity? a. Rubber b. Glass c. Metal d. Newspaper
What is metal?
200
An electrician is wearing rubber gloves for protection. The purpose of the rubber gloves is to — a. keep the electrician dry b. create an electrical circuit c. produce electricity d. insulate the electrician
What is insulate the electrician?
200
Benjamin Franklin conducted this famous experiment that showed lightning was — a. a movement of air molecules b. a magnetic field c. an electrical discharge d. a glowing chemical
What is an electrical discharge?
200
In this picture, the iron filings show the shape of the magnetic — a. axis b. core c. field d. pole
What is a field?
200
Which item is designed to change electrical energy into heat energy? a. Alarm clock b. Hand dryer c. Fan d. Telephone
What is a hand dryer?
300
Electric lights will not come on unless their electrical circuit is a — a. parallel circuit b. series circuit c. closed circuit d. short circuit
What is a closed circuit?
300
What material would be safest to use as an insulator to cover electrical wires? a. Aluminum b. Tin c. Rubber d. Water
What is rubber?
300
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. gravity b. water c. magnetism d. electricity
What is electricity?
300
To make an electromagnet, a conductor should be coiled around — a. a glass tube b. an iron nail c. a roll of paper d. a wooden stick
What is an iron nail?
300
Which form of energy is used by a toaster? a. Chemical b. Electrical c. Solar d. Nuclear
What is electrical energy?
400
A fifth-grade class constructed this circuit. Which of these objects most likely made the light glow when connected to points X and Y? a. Plastic straw b. Cotton string c. Aluminum foil d. Rubber eraser
What is aluminum foil?
400
Copper wire is often wrapped in plastic. Plastic material is a good — a. electromagnet b. insulator c. circuit d. current
What is insulator?
400
Bits of paper are attracted to the surface of a balloon. What attracts the paper pieces to the balloon? a. Friction b. Magnetism c. Potential energy d. Static electricity
What is static electricity?
400
Michael Faraday showed how electric current in a wire produces — a. molecules b. chemicals c. a vibration d. a magnetic field
What is a magnetic field?
400
When in operation, this tool transforms electrical energy mostly into — a. chemical energy b. solar energy c. sound energy d. mechanical energy
What is mechanical energy?
500
A class prepared some electric circuits using battery, connecting wires, and three light bulbs. Which of these circuits can make the three bulbs light?
What is "B"?
500
This instrument can be used to see if materials conduct electricity. Which of these groups contains items that could all conduct electricity to complete the circuit? a. Rubber ball, plastic comb, nail b. Paper clip, penny, screw c. Cork, dollar bill, tweezers d. Pencil, eraser, spoon
What is paper clip, penny, screw?
500
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 —
What is static electricity?
500
Which of these correctly shows what happens when two magnets are placed side by side?
What is "J"?
500
Which energy transformation most likely occurs in a steam iron?
What is electrical energy to heat energy?
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