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Chapter 7 Review Questions Energy

Total questions: 70

Worksheet time: 2hrs 20mins

Name
Class
Date
1.

When gasoline is burned in a car engine, ________ energy is converted into _________ energy.

a)

heat, chemical

b)

chemical, potential

c)

mechanical, chemical

d)

chemical, mechanical

2.

Which example involves the transformation of chemical energy directly into light energy?

a)

a windmill

b)

a glow stick

c)

photosynthesis

d)

a hydroelectric dam

3.

Electrical energy can be transformed into other types of energy. We often experience these changes of energy in our everyday lives. Which example is a transformation from electrical energy to light energy?

a)

motor

b)

flashlight

c)

slow cooker

d)

solar panels

4.

Jane puts some water into an electric kettle and then she connects it to the power source. She observes that after some time, the water inside the kettle heats up and begins to boil. What is happening?

a)

Light energy is transforming into heat.

b)

Heat energy is transforming into electricity.

c)

Electrical energy is transforming into heat energy.

d)

Electrical energy is transforming into light and heat energy.

5.

The rock in the picture is pushed over the edge and it begins to fall. Which type of energy conversion is taking place?

a)

mechanical to heat

b)

sound to mechanical

c)

potential to kinetic

d)

kinetic to potential

6.

Energy can be changed from one form to another. Changes in the form of energy are called energy conversions. Identify which best describes the energy used to pluck guitar strings to make sound.

a)

electricity

b)

electromagnetic

c)

heat

d)

mechanical

7.

A light bulb converts electrical energy into light and ____.

a)

chemical.

b)

electromagnetic.

c)

heat.

d)

nuclear.

8.

How can we increase the gravitational potential energy of the car?

a)

Keep the length of the hill at 50 m but only 5 m tall.

b)

Keep the hill at 10 m tall but increase the length of the hill so that the car has farther to roll.

c)

Take the interior out of the car so that the car has less mass.

d)

Strap a boulder to the car so that it weighs more.

9.

How would you describe the relationship between the mass of a car and its kinetic energy?

a)

As the mass of a car increases, its kinetic energy decreases.

b)

As the mass of a car decreases, its kinetic energy increases.

c)

There is no clear relationship between mass and kinetic energy.

d)

As the mass of a car increases, its kinetic energy increases.

10.

The process by which people walk

a)

requires only a little energy.

b)

is powered by the body’s surplus heat energy.

c)

relies on the conversion of chemical energy from food into mechanical energy by muscles.

d)

relies on the creation of mechanical energy by muscles, which is transferred into heat energy.

11.

The sum of kinetic energy and potential energy within a system is called

a)

thermal energy.

b)

mechanical energy.

c)

chemical energy.

d)

electrical energy.

12.

Which type of energy is converted when gasoline burns in an engine?

a)

elastic potential energy

b)

nuclear potential energy

c)

chemical potential energy

d)

gravitational potential energy

13.

Electrical energy can be transformed into other types of energy. We often experience this transformation of energy in our everyday lives. The example that represents a transformation from electrical to sound energy is

a)

flashlight.

b)

campfire.

c)

television.

d)

lamp.

14.

One of these items transforms electrical energy into sound. It is

a)

firecracker.

b)

a violin.

c)

a radio.

d)

a drum.

15.

Yesenia wants to bake cookies in her electric oven. The oven will transform electrical energy into ________ energy.

a)

heat

b)

light

c)

motion

d)

sound

16.

Which of following statements is TRUE?

a)

In a radio, sound energy is transformed into electricity energy.

b)

In a microwave oven, electricity is transformed into chemical energy.

c)

In a hair dryer, electrical energy is transformed into light and heat.

d)

In a computer, electrical energy is transformed into sound, light, and heat.

17.

A skateboarder heads

down a smooth, steep course. What graph illustrates the change in kinetic and potential energy during this process?

a)

A

b)

B

c)

C

d)

D

18.

The process of changing energy from one form to another.

a)

transmission

b)

transportation

c)

transformation

19.

The law of conservation of energy states that energy can neither be destroyed nor created. According to this law which of these equations is correct?

a)

E=mc2

b)

KE = PE

c)

Energy in = energy out

d)

Energy in = power in

20.

Energy of moving parts

a)

electrical

b)

chemical

c)

mechanical

21.

Solar or light energy

a)

radiant

b)

chemical

c)

mechanical

22.

Energy stored in the bonds of chemical compounds

a)

potential chemical

b)

sound

c)

nuclear

23.

Energy caused by moving electrons

a)

radiant

b)

chemical

c)

electrical

24.

Energy caused by fusion or fission of atoms' nuclei

a)

mechanical

b)

nuclear

c)

chemical

25.

Heat energy

a)

thermal

b)

radiant

c)

sound

26.

Sound energy

a)

potential energy

b)

kinetic energy

c)

both

27.

Wind

a)

mechanical energy

b)

thermal energy

c)

nuclear energy

d)

radiant energy

28.

Bow and arrow

a)

radiant energy

b)

thermal energy

c)

chemical energy

d)

mechanical energy

29.

Fire

a)

thermal energy

b)

mechanical energy

c)

nuclear energy

d)

sound energy

30.

Microwave

a)

sound energy

b)

radiant energy

c)

chemical energy

d)

mechanical energy

31.

Talking

a)

thermal energy

b)

radiant energy

c)

sound energy

d)

mechanical energy

32.

Lightning

a)

electrical energy

b)

nuclear energy

c)

sound energy

d)

chemical energy

33.

Fuel

a)

chemical energy

b)

thermal energy

c)

mechanical energy

d)

sound energy

34.

Fusion of atoms

a)

electrical energy

b)

nuclear energy

c)

radiant energy

d)

thermal energy

35.

Check the types of energy transformation we see when we use a hairdryer. (3)

a)

mechanical energy

b)

thermal energy

c)

electrical energy

d)

chemical energy

36.

Check the types of energy transformation we see when we use an electric keyboard. (2)

a)

electrical energy

b)

sound energy

c)

chemical energy

d)

nuclear energy

37.

Check the types of energy transformation we see when we use a hot air balloon. (3)

a)

chemical energy

b)

thermal energy

c)

mechanical energy

d)

electrical energy

38.
Which type of energy transformation occurs when a flashlight shines?
a)
chemical → thermal → electrical
b)
chemical → electrical → light
c)
thermal → chemical → light
d)
chemical → electrical → chemical
39.
A lamp that plugs into a wall socket draws energy which flows through a thin wire in the bulb causing it to glow. What energy transformations are taking place?
a)
chemical → light → electrical
b)
mechanical → sound → light
c)
thermal → solar → electrical
d)
electrical → thermal → light
40.
Which of the following shows the correct order of the energy transformations that occur when green plants produce their food from the Sun’s energy?
a)
chemical → thermal
b)
light → chemical
c)
thermal → light
d)
chemical → electrical
41.
The Theory of the Conservation of Energy states -
a)
Energy can be created, just not destroyed. It changes its form from one type to another.
b)
Energy can never be created nor destroyed. It can only change its form from one type to another.
c)
The total energy in our Universe changes, as different forms of energies can be transformed from each other under certain circumstances.
d)
Energy transformations do not passively occur in our lives, rather we actively make use of energies and transform energies.
42.
Electrical Energy is transferred to _____ Energy.
a)
Thermal
b)
Solar
c)
Electrical
d)
None
43.

Vibrations produce _______ energy.

a)

chemical

b)

sound

c)

potential

d)

light

44.
what type of energy is stored in a battery?
a)
electrical
b)
chemical
c)
thermal
d)
mechanical
45.
The roller coaster cart has the most gravitational potential energy at position-
a)
W
b)
X
c)
Y
d)
Z
46.
What type of energy is in this picture?
a)
Kinetic
b)
Potential
c)
Chemical
d)
Sound
47.
What kind of energy is represented in this picture?
a)
Thermal
b)
Potential
c)
Nuclear
d)
Mechanical
48.

The picture showing the energy conversion

Chemical → heat

is:

a)
b)
c)
d)
49.

The faster an object moves, the ________ kinetic energy it has.

a)

more

b)

less

50.

Gravitational potential energy depends on the ________ and ________ of the object.

a)

Position (height) and mass

b)

Friction and movement

c)

Mass and Movement

d)

Height and Friction

51.

When you stretch a rubber band, you are storing __________ energy.

a)

kinetic

b)

potential

52.

When a pendulum swings, at which point is kinetic energy greatest?

a)

1

b)

2

c)

3

d)

4

53.

What position has the least amount of potential energy?

a)

W

b)

X

c)

Y

d)

Z

54.

In order to INCREASE the potential energy of an object, you need to:

a)

put the object lower to the ground

b)

raise the object higher

55.

Which energy transformation: burning a log

a)

chemical to thermal

b)

light to chemical

56.

Which energy transformation: eating an apple and running a mile

a)

chemical to mechanical

b)

thermal to light

57.

Which energy transformation: a flower growing

a)

light to chemical

b)

sound to mechanical

58.

What is energy?

a)

moving energy

b)

stored energy

c)

renewable energy

d)

The ability to do work.

59.

What is potential energy?

a)

moving energy

b)

stored energy

c)

renewable energy

d)

non renewable energy

60.

What is kinetic energy?

a)

moving energy

b)

potential energy

c)

stored energy

d)

renewable energy

61.

What is wind?

a)

Air

b)

Nothing

c)

Air in motion

d)

A fan

62.

How can wind become energy?

a)

When a wind turbines changes the kinetic energy in wind to electric energy.

b)

When a windmill goes fast enough

c)

It just naturally is

d)

The sun heats it so it becomes solar energy

63.
Which energy conversion is taking place when you put gasoline in a car?
a)
thermal -> electrical
b)
mechanical -> electrical
c)
chemical -> mechanical
d)
mechanical -> electromagnetic
64.
"Energy can be transformed from one form into another or transformed from one region or another, but energy cannot be created or destroyed."
Which law is this?
a)
Law of Conservation of Mass
b)
Newton's Second Law
c)
Law of Conservation of Energy
d)
Newton's Third Law
65.
What kind of energy is in a moving skateboard?
a)
Potential
b)
Kinetic
66.
What kind of energy is in a rock at the edge of a cliff?
a)
Potential
b)
Kinetic
67.
When a pendulum swings, at which point is potential energy at its greatest?
a)
1
b)
2
c)
3
d)
4
68.
Which point has the most potential energy?
a)
G
b)
f
c)
b
d)
a
69.
The SI unit in which kinetic energy is measured is 
a)
Newton
b)
Kilogram
c)
Joules
d)
Metres per second
70.
Conservation of energy states that energy cannot be ________ or ________, but can be altered from one form to another.
a)
created, destroyed
b)
gravity, force
c)
heat, created

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