OARS Test for Lesson 5: 4th Grade Science:
"A Shocking Discovery": Motors, Doorbells and Earphones
Lesson 5 grade 4
(Test ID: ins702770)
Created with INSPECT® and the Online Assessment Reporting System (OARS)
For Authorized Use Only
1. Which of the following devices does not use electromagnets in its construction?
A
electric motor
B
light bulb
doorbell
C
D
earphone
2. Which of the following devices uses an electromagnet?
A
a compass
B
a doorbell
C
a light bulb
D
bicycle
Use the image of a simple doorbell below to answer the following question(s).
(Questions 3-5)
3. The structure labeled "X" is known as a(n) __________.
A
electromagnet
B
electric generator
C
electric motor
4. Which of the following BEST describes how the doorbell is rung?
A the button turns the battery on, which charges the hammer with electricity to ring the bell
B
the button turns on the electromagnet which pulls the hammer to ring the bell
C
the button turns the motor on, which winds up the hammer to ring the bell
D
the button heats up the wire coils which then bend the hammer back to ring the bell
5. What is the primary function of the button?
A
to move the wire
C
to turn on the electromagnet
B
to signal the battery
D
to start the motor
D
battery
6. Electromagnets that are used in motors, generators, and doorbells work by
converting the electrical energy into
A
motion energy.
B
heat energy.
C
light energy.
chemical energy.
D
7. Doorbells are commonly used to alert a person when someone is at the door.
Doorbells USUALLY work by
A electrical energy being transformed into sound energy.
B
sound energy being transformed into electrical energy.
C
chemical energy being transformed into sound energy.
D
electrical energy being transformed into light energy.
8. Which of the following devices work by transforming electrical energy into sound
energy?
A
engines
B
earphones
C
electric lawn mowers
D
electromagnets
9. Which of the following is an example of the transformation of electrical energy
into energy of motion?
A
an electric stove
C
a car with an electric motor
B
a television
D
a gas powered lawn mower
10. Electric motors rely on electromagnets in order to work. Electric motors turn
because electromagnets cause alternating forces that attract and repel, which
A converts motion energy into electrical energy.
B
converts electrical energy into motion energy.
C
converts fossil fuels into electric energy.
D
converts magnetic energy into electric energy.
11. In an electric turbine generator an electromagnet interacts with a moving
turbine to
A turn electrical energy into motion energy.
B
turn fossil fuels into electric energy.
C
turn motion energy into electrical energy.
D
turn magnetic energy into electric energy.
12. Generators are devices that use electromagnets to transform energy of motion to
electrical energy. Which of the following devices is a generator that relies on an
electromagnet to transform energy of motion into electrical energy?
A
electric lawn mower
B
bicycle
C
light bulb
D
13. Electric fans, hair dryers, and turbines are all common devices that
A
generate electricity.
C
convert motion energy into electrical energy.
B
use electromagnets.
D
convert electrical energy into motion energy.
turbine
14. This is a model of a simple wind turbine.
What is the MOST likely function of a turbine like this one?
A wind energy is converted into electrical energy
B
electrical energy is converted into mechanical energy
C
mechanical energy is converted into heat energy
D
wind energy is converted into heat energy
15. This is a model of a simple wind turbine.
As wind speed increases, __________.
A the turbine turns faster, creating less electrical energy
B
the turbine turns slower, creating more mechanical energy
C
the turbine turns faster, creating more electrical energy
D
the turbine turns slower, creating less mechanical energy
16. This is a model of a stereo speaker.
As the volume level is increased __________.
A more current flows into the electromagnet and it is less attracted to the speaker magnet
B
less current flows into the electromagnet and it is more attracted to the speaker magnet
C
more current flows into the electromagnet and it is more attracted to the speaker magnet
D
less current flows into the electromagnet and it is less attracted to the speaker magnet
17. Jeremy has been playing outside in the hot sun all morning. He wants to cool off
so he goes inside his house, plugs in a fan, and turns it on. What type of energy
transfer happens when Jeremy turns on the fan?
A Electrical energy is converted to motion.
B
Motion is converted to electrical energy.
C
Chemical energy is converted to motion.
D
Electrical energy is converted to heat.
18. Which is an example of electrical energy converting into motion energy?
A
a desk lamp
C
an electrical heater
B
a toaster
D
a vacuum cleaner
19. Electric cars use large batteries, rather than gasoline, for power. This is an
example of electric energy being converted into _________.
A
heat energy
B
motion energy
C
light energy
D
chemical energy
20. Electricity traveling through a wire is an example of __________.
A the push–pull force of a magnet
B
a force applied by a simple machine
C
energy being transferred from one place to another
D
energy flowing through the water cycle
21. Sarah works in a high rise building. To get to her office, she uses the elevator.
When she pushes the "up" button on the elevator, the elevator starts to move.
The energy transformation that takes place when Sarah presses the "up" button is
from __________.
A
chemical to mechanical
C
electrical to mechanical
B
electrical to potential
D
mechanical to electrical
22. Which of the following devices transforms electrical energy into mechanical
energy?
A
a ceiling fan
B
a kitchen blender
C
an electric car
D
All of the above
23. Which sequence BEST represents why Cameron's mom can hear Cameron's voice
on the telephone?
A sound energy changes into electrical energy
B
sound energy changes into electrical energy, and then back into sound energy again
C
sound energy changes into electrical energy, and then into chemical energy
D
sound energy changes into light energy, and then back into sound energy again
24. In the above diagram, the electrical energy is MOSTLY changed to
______________.
A motion
B
heat
C
light
D
sound
25. In the above diagram, the electrical energy is MOSTLY changed to
______________.
A motion
B
heat
C
light
D
sound
26. In the above diagram, the electrical energy is MOSTLY changed to
______________.
A motion
B
heat
C
light
D
sound
27. In the above diagram, the electrical energy is MOSTLY changed to __________.
A motion
B
heat
C
light
D
sound
28. In the above diagram, the electrical energy is MOSTLY changed to __________.
A motion
B
heat
C
light
D
sound