Name: ________________________ Class: ___________________ Date: __________
ID: A
Energy Transformation Test
Multiple Choice
Identify the choice that best completes the statement or answers the question.
____
1. A toy robot can walk and talk and runs on batteries. What type of energy is stored in the batteries?
A.
B.
C.
D.
____
2. Miguel is making a picture frame. He sticks a nail into a piece of wood and hits the nail with a
hammer. Which form of energy is not released when the hammer hits the nail?
A.
B.
C.
D.
____
chemical
kinetic
nuclear
thermal
electrical
thermal
kinetic
sound
3. Which type of energy is a form of electromagnetic energy?
A.
B.
C.
D.
chemical
light
nuclear
sound
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Name: ________________________
____
ID: A
4. When the space shuttle launched, Donna felt the warmth produced by the firing engines. Which
form of energy was released during the launch?
When the space shuttle launched, Donna felt the heat produced. Which form of energy was
released during the launch?
A.
B.
C.
D.
kinetic
light
sound
thermal
2
Name: ________________________
____
ID: A
5. Israel observed a bolt of lightning during a storm as shown in the figure below.
Which form of energy does a bolt of lightning produce?
A.
B.
C.
D.
____
6. Inside the sun, hydrogen atoms combine to form helium atoms. This process releases light and
warmth. Which form of energy powers the sun?
A.
B.
C.
D.
____
light
mechanical
nuclear
potential
electromagnetic
mechanical
nuclear
thermal
7. A group of sheep are grazing in a field. As they eat, the sheep break down the molecules in the
grass, which releases energy. Which form of energy is stored in the grass?
A.
B.
C.
D.
chemical energy
elastic energy
nuclear energy
thermal energy
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Name: ________________________
____
8. On a cold winter day, Delia puts logs into a fireplace. Then she strikes a match and sets the logs on
fire. As the fire burns, which two forms of energy are released?
A.
B.
C.
D.
____
ID: A
light and thermal
chemical and light
thermal and electrical
electrical and chemical
9. When a hand-held fan is turned on, the blades spin. Which diagram shows the energy conversion
that is required to make the fan work?
A.
B.
C.
D.
____
10. Gordon throws a baseball into the air. It rises, stops when it reaches its greatest height, and then
falls back to the ground. At what point does kinetic energy convert to potential energy?
A.
B.
C.
D.
when the baseball is rising
when the baseball is falling
just after the baseball hits the ground
while the baseball is stopped in the air
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Name: ________________________
____
ID: A
11. The figure below shows a toaster.
Which energy conversion takes place when a toaster is switched on?
A.
B.
C.
D.
____
chemical to sound
electrical to sound
chemical to thermal
electrical to thermal
12. Mr. Cohen is a scientist who is testing the efficiency of a 9 V battery by measuring how much
electrical energy it releases. He determines that 7 V of energy is converted to electrical energy.
Which of these formulas shows how to calculate the efficiency of the battery?
A.
B.
C.
D.
(7 − 9) × 100
(9 − 7) × 100
(9 ÷ 7) × 100
(7 ÷ 9) × 100
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Name: ________________________
____
ID: A
13. Four different brands of batteries each store 5.5 kj of energy. The table below shows how much
electrical energy each battery releases.
Brand
A
B
C
D
Electrical energy released
(kilojoules)
4.25
4.32
4.19
4.07
Which battery is the most efficient?
A.
B.
C.
D.
____
14. A standard light bulb and an energy-efficient light bulb both receive 60 W of energy. Which
statement is most likely true about the energy released by the energy-efficient light bulb?
A.
B.
C.
D.
____
brand A
brand B
brand C
brand D
It releases less light energy and less thermal energy than the standard light bulb.
It releases more light energy, but less thermal energy, than the standard light bulb.
It releases less light energy, but more thermal energy, than the standard light bulb.
It releases more light energy and more thermal energy than the standard light bulb.
15. An electric motor transforms most of its energy into useful kinetic energy and wastes only a small
amount as thermal energy. What property of the electric motor is being described?
A.
B.
C.
D.
efficiency
power
resistance
voltage
Short Answer
1. Identify two types of energy produced by a hair dryer.
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Name: ________________________
ID: A
2. A toaster, like the one shown below, toasts slices of bread by producing thermal energy.
Identify the form of energy that is converted to thermal energy as well as the type of energy that is
released.
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