WorksheetsElectricity Review
Total questions: 19
Worksheet time: 34mins
Name
Class
Date
1.
What type of energy is produced from plugging in a toaster besides heat energy?
a)
heat
b)
light
c)
sound
d)
magnetic
2.
What conducts the electric current around a complete circuit?
a)
wire
b)
switch
c)
battery
d)
light bulb
3.
Which is the best example of electric energy being transformed into heat energy?
a)
microwave oven
b)
a bedside lamp
c)
electric fan
d)
telephone
4.
Missy wanted to listen to music on her CD player. She plugged it into the wall, turned it on, and pressed play. Which best describes what happened?
a)
Electrical energy is changed into sound energy.
b)
Heat energy is changed into sound energy.
c)
Light energy is changed into sound energy.
d)
Sound energy is changed into electrical energy.
5.
What is the purpose of the switch in an electrical circuit?
a)
connect the light bulb and the power source
b)
transfer current electricity to the light bulb
c)
turn current electricity on and off
d)
change a series circuit to a parallel circuit
6.
In what kind of circuit does the electrical current flow in one path?
a)
closed
b)
complete
c)
parallel
d)
series
7.
Rosa wanted to use strings of old holiday lights to decorate her booth at the school's Food Fair. One string of lights did not work. She had to remove each bulb and test it to find out which ones were burned out and then replace them. What did she learn about this string of lights?
a)
They only light when the circuit is open.
b)
They were wired in a series circuit.
c)
They were wired in a parallel circuit.
d)
They only light when the bulbs are the same color.
8.
There were two lights burned out in our classroom. All the other lights were still on. From this observation, it can be inferred that the lights in this classroom were wired in a/an
a)
series circuit
b)
parallel circuit
c)
closed circuit
d)
open circuit
9.
Seven light bulbs are connected to one electrical socket. When one bulb burns out, the others continue to shine. Which is true about the bulbs?
a)
They are part of a parallel circuit.
b)
They are part of a series circuit.
c)
They are part of an open circuit.
d)
They are part of an incomplete circuit.
10.
The materials that an electric current can flow through are called _____________________.
a)
circuits
b)
conductors
c)
switches
d)
insulators
11.
Which of these substances is the best conductor of electricity?
a)
wood
b)
brick
c)
copper
d)
plastic
12.
Which of the following explains why it is unsafe to use a metal fork to remove a piece of bread that has become stuck in the toaster?
a)
The fork will catch on fire.
b)
The fork will melt in the toaster.
c)
The fork will conduct electricity.
d)
The fork will damage the toaster.
13.
Many electrical wires are wrapped with a plastic coating because plastic is ________________________.
a)
less expensive than steel
b)
heavier than copper
c)
able to keep its shape
d)
a good insulator
14.
Why do electricians wear rubber gloves?
a)
Rubber keeps their hands dry.
b)
Rubber acts as an insulator.
c)
Rubber keeps her hands warm.
d)
Rubber acts as a conductor.
15.
The magnetic fields of any magnet are greatest around ________________________________.
a)
the middle
b)
the poles
c)
only the south pole
d)
only the north pole
16.
Steel cans are separated from aluminum cans in a recycling center. Which of the following is the best way the recycling center can separate the steel cans from the aluminum cans?
a)
cool the cans at a low temperature
b)
put the cans in water
c)
put the cans under an electromagnet
d)
sort the cans by size
17.
Which is the safest way to conduct an investigation with electrical circuits?
a)
Do not conduct the investigation indoors.
b)
Do not conduct the investigation with a power source.
c)
Do not conduct the investigation near water.
d)
Do not conduct the investigation with wires.
18.
Pieces of scrap iron are attracted to the metal disk of a crane. The metal disk is most likely functioning as which of the following?
a)
a battery
b)
an electromagnet
c)
an insulator
d)
an engine
19.
Jesse was making an electromagnet. First she wrapped a piece of insulated wire around an iron nail 20 times. Then she attached both ends of the wire to a battery. Her electromagnet picked up 5 paper clips. What could she do to pick up more paper clips?
a)
Wrap the wire around the nail 30 times
b)
Use a wooden nail instead of an iron nail
c)
Wrap the wire around the nail 10 times
d)
Use a battery with a lower voltage
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