Electric Circuits
Magnetism
Electromagnetism
Heat
Conductors/Insulators
100
Would this electric circuit work?
Yes
100
Which one will a magnet attract?
A. A plastic comb
B. A paper clip
C. Shoelace
B. A paper clip
100
An iron nail by itself is not a magnet. Which of these can make the nail act like a magnet?
A. touch the nail with a magnet and then take the magnet away
B. leave the nail on top of the refrigerator
C. wrap the nail with a coil of wire and run a current through the wire
D. bend the nail into the shape of a horseshoe
C. Wrap the nail with a coil of wire and run a current through the wire
100
Which kind of matter can heat move through?
A. solids
B. gases
C. liquids
D. all of these
D. All of these
100
Vacuum cords are coated with rubber or plastic coating to protect people from the electricity that runs through the cord. Why is this?
A. Rubber is an electric insulator.
B. Rubber is easy to handle.
C. Rubber is an electric conductor.
D. Rubber looks pretty.
A. Rubber is an electric insulator.
200
What will happen to the light bulb?
A. It will light up because the wire is electrically charged.
B. It will not light up because the battery is not charged.
C. It will light up using energy from the battery.
D. It will not light up because a complete loop of wires is needed
D. It will not light up because a complete loop of wires is needed.
200
The south end of a bar magnet is labeled:
A. N
B. S
B. S
200
Electromagnets and solid permanent magnets will both attract iron. How are electromagnets different than permanent magnets?
A. Electromagnets can be made of plastic.
B. Permanent magnets can be turned off.
C. Permanent magnets use a coil of wire.
D. Electromagnets can be turned off.
D. Electromagnets can be turned off
200
Adrianne has just poured a cup of hot coffee. When she grabs the cup, it is very hot because the heat has transferred from the coffee to the cup.
What kind of cup is Adrianne most likely using?
A. a tin cup
B. any of these
C. a wooden cup
D. a plastic cup
A. A tin cup
200
Objects that conduct electricity can easily carry an electrical charge. Which of the following materials best conducts electricity?
A. cotton string
B. copper wire
C. plastic tubing
D. rubber sheets
B. Copper wire
300
What statement best explains what is happening in this circuit?
A. Electricity is flowing because there is only one path for it.
B. Electricity is flowing because there are two batteries.
C. Electricity is not flowing because the wires are too long.
D. Electricity is not flowing because the switch is open.
D. Electricity is not flowing because the switch is open.
300
A bar magnet is strongest at the:
A. Middle
B. Poles
B. Poles
300
The strength of an electromagnet depends on _______.
A. the number of coils of wire
B. the diameter (width) of the iron core
C. the number of batteries
D. all of these
D. All of these
300
Why are frying pans usually made out of metal?
A. because metal is a poor conductor of electricity
B. because metal is a good conductor of heat
C. because metal is a poor conductor of heat
D. because metal is a good conductor of electricity
B. Because metal is a good conductor of heat
300
Mrs. Gray's class has built an electrical circuit. They need to complete the circuit by adding an object that will allow electricity to flow through it easily. One student suggests that they use wood.
Will the student's suggestion work?
A. Yes. Wood is an insulator.
B. No. Wood is an insulator.
C. Yes. Wood is a conductor.
D. No. Wood is a conductor.
B. No. Wood is an insulator.
400
What will happen when someone connects wire 3 to the paper clip?
A. The light bulb will break.
B. The paper clip will turn black.
C. The light bulb will light up.
D. The battery will die.
C. The light bulb will light up.
400
Poles that are not alike:
A. Repel each other
B. Attract each other
B. Attract each other
400
An electromagnet is created by
A. rubbing two pieces of metal together quickly.
B. running electric current through a coiled, conductive wire.
C. brushing a piece of steel with a soft cloth.
D. putting a piece of soft iron in an outlet.
B. Running electric current through a coiled, conductive wire
400
Which of the following is a good conductor?
A. metal
B. plastic
C. wood
D. all of these
A. Metal
400
Objects that stop the flow of electricity are good insulators. Which of the following materials would be the best insulator for an electrical wire?
A. plastic tubing
B. aluminum pipes
C. water
D. copper wire
A. Plastic tubing
500
Which of these is required to make a circuit?
A. a light bulb
B. a closed loop
C. static electricity
D. two batteries
B. A closed loop
500
Poles that are alike:
A. Repel each other
B. Attract each other
A. Repel each other
500
When would an electromagnet stop working?
A. An electromagnet would stop working when the electric current is interrupted.
B. An electromagnet would stop working when it cools below 45°F.
C. An electromagnet would stop working when it gets sunlight.
D. An electromagnet would stop working after 24 hours.
A. An electromagnet would stop working when the electric current is interrupted.
500
Which of the following is a good insulator?
A. silver fork
B. iron pan
C. plastic cup
D. copper pot
C. A plastic cup
500
Which of the following school supplies is a good conductor of electricity?
A. a rubber band
B. a pencil eraser
C. a highlighter
D. a paper clip
D. A paper clip