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Module 4 Quizizz Review

Total questions: 151

Worksheet time: 4hrs 47mins

Name
Class
Date
1.

In order for work to be done on an object, the object must __________________.

a)

not move at all

b)

move some distance in the direction of the force applied to it

c)

move some distance in the opposite direction of the force applied to it

2.

The rate at which work is done is called ____________.

a)

force

b)

mechanical advantage

c)

power

d)

efficiency

3.

The unit for work is called a

a)

Newton

b)

Joule

c)

Joule-meter

d)

Watt

4.

The unit for force is called a

a)

Newton

b)

Joule

c)

Joule-meter

d)

Watt

5.

The force you exert on a machine is called

a)

input force

b)

output force

6.

A machine's _______________ is the number of times the machine increases a force exerted on it.

a)

input force

b)

efficiency

c)

output force

d)

mechanical advantage

7.

Energy that is stored is ________ energy.

a)

Kinetic

b)

Electrical

c)

Potential

d)

Chemical

8.

Mechanical energy is the total kinetic and ________ energies in a system.

a)

Chemical

b)

Thermal

c)

Potential

d)

Electrical

9.

What is the formula for work?

a)

W= F x D

b)

W= D/T

c)

W= D x T

d)

W= F/D

10.

What is the Law of Conservation of Energy?

a)

Energy stays the same

b)

Energy may change form but it cannot be created nor destroyed.

c)

Energy decreases

d)

Energy Increase and decreases after being destroyed.

11.

What is energy?

a)

The ability to move

b)

The ability to stay the same with no change

c)

The ability to cause change in movement

d)

The ability to cause change.

12.

Two or more simple machines that work together is called_______.

a)

Simple Machine

b)

Compound Machine

c)

Screw

d)

Wedge

13.

What is required for work to be done?

a)

Movement

b)

Time and movement

c)

something has to move and the motion must be the same direction as force

d)

something has to move and the motion must increase as well as force.

14.

Power is measured in_________.

a)

Watts

b)

Joules

c)

Newtons

d)

Calories

15.

What simple machine can be found in an ax?

a)

Pulley

b)

Wedge

c)

Screw

d)

Incline Plane

16.

A device that makes work easier is a _________.

a)

Machine

b)

Simple Machine

c)

Compound

d)

Compound Machine

17.

What are the six simple machines?

a)

Lever,Pulley,Wheel & Axle, Screw, Incline Plane, Wedge

b)

Wedge, Box, Paper, Lever, Scissors, Pen

c)

Wedge, lever pulley, screw, incline plane, bike

d)

Scissors, bike, car, lever, pulley, wedge

18.

Divide input work by output work and multiply by 100% to find a machines ______

a)

input force

b)

output force

c)

efficiency

19.

The force exerted by the machine is the ______

a)

input force

b)

output force

c)

efficiency

20.

A machine's mechanical advantage is the output force _______________ the input force.

a)

added to

b)

divided by

c)

multiplied by

d)

subtracted from

21.

Why would adding oil to the moving parts of a machine increase its efficiency?

a)

It increases the ideal mechanical advantage

b)

It decreases the ideal mechanical advantage

c)

It increases friction

d)

It decreases friction

22.

Force in = 200 N Force out = 600 N. What is the mechanical advantage?

a)

0.33

b)

12

c)

1200

d)

3

23.
Dave is helping his family load a moving van with boxes. He lifts up each box and places it in the van. He then climbs into the van and moves the box to the back of the truck. What simple machine could help Dave with this task?
a)
a wedge
b)
a lever
c)
an inclined plane 
d)
a pulley
24.
The unit used to measure work is the 
a)
Watt
b)
Newton
c)
Joule
d)
meter
25.
Using a lever, Joe is able to lift a 10,000 N car off of the ground with a force of 1000 N. What is the mechanical advantage of the lever?
a)
1
b)
10
c)
100
d)
1000
26.
A 16 N force is applied to an object and 96 J of work is done. How far was the object moved?
a)
6 m
b)
16 m 
c)
80 m 
d)
1536 m 
27.

Number of times a simple machine multiplies the effort force.

a)

resistance force

b)

work

c)

mechanical advantage

28.
What is a machine that uses only one movement called?
a)
Simple
b)
Basic
c)
Complex
d)
Compound
29.
What is the term that is used to describe the tendency of objects to remain at rest or in motion?
a)
inertia
b)
forces
c)
energy
d)
power
30.
When two or more simple machines work together, they are called a(n)____.
a)
compound machine
b)
screw 
c)
simple machine
d)
effort machine
31.
What is the mechanical advantage if you lift a load of 300 newtons and you only push down with 50 newtons?
a)
250
b)
50
c)
60
d)
6
32.

What is the efficiency of a machine if 55.3 J of work are done on the machine, but only 14.3 J is produced by the machine?

a)
0.25 J
b)
26%
c)
386%
d)
3.86 J
33.

An object has 12.4 J of potential energy and 23.5 J of kinetic energy. What is the mechanical energy of the system?

a)

11.1 J

b)

1.895 J

c)

35.9 J

d)

291.4 J

34.

What is the kinetic energy of an 9 kg bowling ball rolling at 3.30 m/s?

a)

29.7 J

b)

323.4 J

c)

49.005 J

d)

14.85 J

35.

An 80 kg skier stands at the top of a 40 meter slope. What is her gravitational potential energy before she skies down the slope?

a)

3200 J

b)

31,360 J

c)

15,680 J

d)

19.6 J

36.

If you hold a 20 N object 2 m off of the ground, how much work have you done?

a)

40 J of Work

b)

10 J of Work

c)

No Work

d)

18 J of Work

37.

If you drive your 1,000 kg car from sea level up to the Nu'uanu Pali lookout, which is 366 m above sea level, how much will you have increased your car's gravitational potential energy?

a)

3,000,000 J

b)

366,000 J

c)

3,586,800 J

d)

586,800 J

38.

What is the kinetic energy of a 4 kg rock falling through the air at 5 m/s?

a)

10 J

b)

50 J

c)

20 J

d)

200 J

39.

If a rock falls from a cliff, at what point are its kinetic energy and its potential energy the same? Ignore air resistance.

a)

Just as it starts to fall

b)

just before it hits the bottom

c)

halfway down

d)

never

40.

If two rocks are launched through the air at the same speed, but one has twice as much mass as the other, how do their kinetic energies compare?

a)

The kinetic energy of the two rocks is the same because they have the same speed

b)

The rock with the greater mass will only move a small distance and then fall straight to the ground

c)

The two rock could not have the same speed if they have different masses

d)

The rock with the greater mass has more kinetic energy than the rock with less mass even though they are traveling at the same speeds because both mass and speed affect kinetic energy.

41.

You’re watching a volleyball game and someone asks you what type of energy best describe the movement of the volleyball players. Which of the following choices should your answer be in order to be correct?

a)

Chemical

b)

Sound

c)

Mechanical

d)

Potential

42.

Where would a car traveling on a roller coaster track have the most potential energy?

a)

At the bottom

b)

Halfway to the top

c)

at the top

d)

halfway to the bottom

e)

It is always the same

43.

What would happen to the kinetic energy of an object if you doubled the mass?

a)

The kinetic energy would be cut in half

b)

The kinetic energy would double

c)

The kinetic energy would triple

d)

It would stay the same because mass does not effect kinetic energy

44.

If a 2 kg ball is traveling at 4 meters per second, what is its kinetic energy?

a)

1 J

b)

2 J

c)

4 J

d)

8 J

e)

16 J

45.

Which point has the most kinetic energy?

a)

Ball G

b)

Ball F

c)

Ball E

d)

Ball D

e)

Ball A

46.

As a pendulum swings from its highest to lowest position, what happens to its kinetic and potential energy?

a)

Both the potential energy and kinetic energy decrease

b)

The potential energy decreases while the kinetic energy increases

c)

The kinetic energy decreases while the potential energy increases

d)

Both the potential energy and kinetic energy increase

47.

For work to be done on an object,

a)

some force need only be exerted on the object.

b)

the object must move some distance as a result of a force.

c)

the object must move, whether or not a force is exerted on it.

d)

the object must not move.

48.

Energy is the rate at which work is done

a)

True

b)

False

49.

A 35 kg chair is lifted 5 m off the ground. What is its potential energy?

a)

175 J

b)

30 J

c)

1715 J

d)

40 J

50.

What is the kinetic energy of a 1-kilogram ball is thrown into the air with an initial velocity of 30 m/sec?

a)

30 J

b)

450 J

c)

900 J

d)

29 J

51.

What is the potential energy of a 3 kilogram-ball that is on the ground?

a)

9.8 J

b)

3 J

c)

1 J

d)

0 J

52.

A 75kg refrigerator is located on the 70th floor of a skyscraper (300 Meters above the ground). What is it's potential energy?

a)

220,500 J

b)

225,000 J

c)

375 J

d)

39.2 J

53.

If Ronnie is driving a truck with a velocity of 40m/s and the truck has a mass of 1120kg then the truck has __________ energy in the amount of _________.

a)

POTENTIAL ENERGY in the amount of 439,040 J

b)

POTENTIAL ENERGY in the amount of 896,000 J

c)

KINETIC ENERGY in the amount of 439,040 J

d)

KINETIC ENERGY in the amount of 896,000 J

54.

There is a bell at the top of a tower that is 45 m high. The bell weighs 19 kg. When the bell is ringing it has 38 J of kinetic energy. What is the mechanical energy of the bell?

a)

8379 J

b)

8417 J

c)

32,490 J

d)

102 J

55.

A 5 kg object is moving downward at a speed of 12 m/s. If it is currently 2.6 m above the ground then what is the mechanical energy of the object?

a)

360 J

b)

487.4 J

c)

127.4 J

d)

156 J

56.

A grape fruit has 1568 J of potential energy at the top of a tree, but when the grape fruit falls it has 16 J of kinetic energy. What is the mechanical energy of the grape fruit?

a)

0 J

b)

1584 J

c)

25,088 J

d)

98 J

57.

If a bird is flying through the air with 10 J of kinetic energy and then it lands on the ground and has 0 J of potential energy what is the mechanical energy of the bird?

a)

0 J

b)

1 J

c)

10 J

d)

100 J

58.

What does friction produce that reduces efficiency?

a)

heat

b)

water

c)

energy

d)

work

59.

In using scissors to cut paper, the work input is:

a)

the person moving the scissors to cut paper

b)

the paper being cut

c)

located at the fulcrum

d)

located at the load

60.

This tells how much faster or easier a machine makes the work:

a)

efficiency

b)

mechanical advantage

c)

input force

d)

output force

61.

Mechanical advantage is the number of times a machine _____ the effort.

a)

multiplies

b)

reduces

c)

redirects

62.

Real machines:

a)

actually exist

b)

have an efficiency less than 100%

c)

lose energy due to friction

d)

all are correct

63.

Efficiency is a ratio which tells how well a machine works.

a)

true

b)

false

64.

The purpose of a simple machine is to reduce the amount of _____ needed to accomplish a task.

a)

force

b)

work

c)

mechanical advantage

d)

efficiency

65.

What is it called when something equals the output work divided by the input work; expressed as a percentage.

a)

outside work

b)

input work

c)

efficiency

d)

data

66.

What is the tool used to measure force called?

a)

scales

b)

triple beam balance

c)

ruler

d)

spring scales

67.

What is a device that helps reduce the amount of effort force required to do work by increasing the distance the force is applied called?

a)

work

b)

spring scales

c)

compound / complex machine

d)

simple machine

68.

What is a unit of work or energy equal to the work done by a force of one newton acting through a distance of one meter, force X distance = work / ______?

a)

joule

b)

newton

c)

pounds

d)

grams

69.
A golf pro swings his driver which weighs 0.75Kg at a velocity of 60 m/s. Calculate the kinetic energy of the club.
a)
2700 J
b)
16.9 J
c)
1350 J
d)
45 J
70.
What is the KE of a football which has a mass of 0.8 kg and is kicked at a velocity of 10m/s.
a)
80 J
b)
3.2 J
c)
160 J
d)
40 J
71.
You serve a volley ball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30m/s. The ball has ____ kinetic energy. Calculate it.
a)
1890 J
b)
3780 J
c)
945 J
d)
31.5 J
72.
What is the kinetic energy of a 4kg shotput thrown with a velocity of 13m/s
a)
676 J
b)
3.25 J
c)
17J
d)
338 J
73.

Energy stored because of gravity is called:

a)

Gravitational Potential Energy

b)

Kinetic Energy

c)

Mechanical Advantage

d)

Chemical Energy

74.

At which point does the ball has the greatest gravitational potential energy (GPE)?

a)

A

b)

G

c)

D

d)

C

e)

G

75.

Which would have the LEAST gravitational potential energy (GPE)?

a)

A ball sitting on the ground

b)

Moon viewed from the Earth

c)

An airplane flying 30,000 feet above the ground

d)

A rock sitting on top of Mt. Everest

76.

How could you increase the gravitational potential energy of an object without changing its mass and gravity?

a)

Make the object larger

b)

Lower the object towards the ground

c)

Raise the object farther off the ground

d)

Allow the object to roll on the ground

77.

How could you increase the object's gravitational potential energy (GPE) without changing its distance from the ground (height) and gravity?

a)

Decrease the object's mass

b)

Increase the object's height

c)

Increase the object's mass

d)

Decrease the object's height

78.

Gravitational potential energy depends on the strength of gravity, ________ and ________ of the object.

a)

height and mass

b)

friction and movement

c)

mass and movement

d)

height and friction

79.

You throw a ball into the air as shown in the diagram. At what point does the ball have the most gravitational potential energy?

a)

W

b)

X

c)

Y

d)

Z

80.

What is the value of the Earth's acceleration due to gravity (g)?

a)

9.8 m/s2

b)

100 m/s2

c)

25 m/s2

d)

3.14 m/s2

81.

A 2 kg book is placed on a shelf 5 meters high. What is the potential energy of the book relative to the floor? (Use g=9.8 m/s2g = 9.8 \, \text{m/s}^2 )

a)

49 J

b)

98 J

c)

10 J

d)

9.8 J

82.

If a bird is flying at a height of 100 meters with a mass of 2 kg, what is its potential energy? (Assume g=9.8 m/s2g = 9.8 \, \text{m/s}^2 )

a)

1960 J

b)

980 J

c)

196 J

d)

9800 J

83.

A diver of mass 70 kg jumps from a 3 m high diving board. What is the potential energy of the diver at the top of the diving board? (Use g=9.8 m/s2g = 9.8 \, \text{m/s}^2 )

a)

2058 J

b)

2100 J

c)

1764 J

d)

2940 J

84.

A 10 kg object is held 2 meters above the ground. What is the potential energy of the object? (Assume g=9.8 m/s2g = 9.8 \, \text{m/s}^2 )

a)

196 J

b)

98 J

c)

20 J

d)

980 J

85.

If a stone of mass 1 kg is dropped from a height of 45 meters, what is its potential energy just before it starts to fall? (Use g=9.8 m/s2g = 9.8 \, \text{m/s}^2 )

a)

441 J

b)

450 J

c)

490 J

d)

442 J

86.

As the ball is dropped, the potential energy decreases while the kinetic energy increases however the amount of energy stays the same.

a)

True

b)

False

87.

Before fruit falls from a tree, how does energy flow?

a)

Potential - Kinetic - Sound

b)

Light - Kinetic - Heat

c)

Potential - Sound - Heat

d)

Solar - Kinetic - Heat

88.

A toy car is traveling up a ramp. What happens to the energy as it goes up the ramp?

a)

Kinetic energy increases while potential decreases.

b)

Potential energy increases while kinetic decreases.

c)

Both potential and kinetic energy increases.

d)

Both potential and kinetic energy decreases.

89.

Which position has the most kinetic energy?

a)

1

b)

2

c)

3

d)

4

90.
Name the energy conversion that occurs when Charlie rides his skateboard up to the top of the ramp. (Look closely to where the arrow is pointing.)
a)
Chemical →  Gravitational
b)
Electrical → Radiant 
c)
Gravitational → Elastic
d)
Thermal → Electrical
91.
Which type of energy is represented by a rubber band. 
a)
Thermal
b)
Elastic 
c)
Gravitational 
d)
Sound 
92.
At which point is Potential Energy at its max?
a)
W
b)
X
c)
Y
d)
Z
93.
When a pendulum swings, at which point is the Kinetic Energy at its Max?
a)
1
b)
2
c)
3
d)
4
94.
What form of energy is represented by a rock sitting at the top of a cliff?
a)
Electrical 
b)
Chemical 
c)
Elastic 
d)
Gravitational 
95.
__________ energy is the energy due to motion.
a)
Kinetic 
b)
Potential 
c)
Neither 
d)
Both
96.
__________ energy is the energy that is stored. 
a)
Kinetic 
b)
Potential 
c)
Neither 
d)
Both
97.
When a roller coaster stops, the energy is destroyed.
a)
True 
b)
False 
98.
What form of energy is represented by fusion on the Sun?
a)

Electromagnetic / Radiant

b)
Electrical 
c)
Chemical 
d)
Gravitational
99.
All forms of energy can be described as which two types of energy?
a)
Thermal and Kinetic
b)
Motion and Gravitational 
c)
Kinetic and Potential
d)
Electrical and Chemical
100.
What unit is Energy measured in?
a)
Newtons 
b)
Joules 
c)
Grams 
d)
Volts
101.
What are the two factors that affect kinetic energy?
a)
Time and Energy
b)
Power and Mass
c)
Mass and Velocity
d)
Time and Work
102.
What are the two factors that affect (Gravitational) Potential Energy?
a)
Gravity and Time
b)
Distance and Force
c)
Mass and Height
d)
Power and Gravity
103.
The stored energy found in food, muscles, batteries and fuel are examples of which form of energy?
a)
Radiant energy
b)
Chemical energy
c)
Sound energy
d)
Thermal energy
104.
A device that converts Electrical Energy and into Thermal Energy.
a)
A Battery
b)
A Hair Dryer
c)
A Bicycle
d)
Your Stomach
105.
A device that converts Electrical Energy to Radiant energy.
a)
A Blender
b)
A Light Bulb
c)
A Bicycle
d)
A Balloon
106.
Name the Energy conversion from the Sun to a growing apple tree.
a)
Nuclear → Electrical
b)
Gravitational → Thermal
c)
Chemical → Motion
d)
Radiant → Chemical
107.
Name the Energy Conversion of putting fuel into a jet plane for it to fly at a constant height on a trip to Hawaii. 
a)
Chemical → Thermal, Radiant, Motion and Sound 
b)
Gravitational → Nuclear, Radiant, Motion and Sound 
c)
Sound → Thermal, Radiant, Motion and Chemical
d)
Chemical → Elastic, Radiant, Motion and Gravitational 
108.
Name the Energy Conversion of a fan that is turned on. 
a)
Chemical → Radiant, Thermal and Sound
b)
Electrical → Thermal, Sound and Motion
c)
Gravitational → Thermal, Sound and Radiant
d)
Chemical → Elastic, Motion and Sound 
109.
Name the Energy Conversion of a cracked Glow Stick. 
a)
Radiant → Elastic 
b)
Chemical → Radiant
c)
Nuclear → Motion
d)
Radiant → Thermal
110.
Name the Energy Conversion of an unplugged Chromebook playing a video?
a)
Chemical→ Electrical → Thermal, Sound and Radiant 
b)
Electrical → Thermal, Sound and Radiant 
c)
Nuclear→ Electrical → Thermal, Sound and Motion
d)
Thermal → Electrical → Chemical, Sound and Radiant 
111.
Name the Energy Conversion of a Clothing Dryer. 
a)
Chemical→ Thermal and Radiant
b)
Electrical → Elastic, Thermal and Sound 
c)
Gravitational → Nuclear, Sound and Thermal 
d)

Electrical → Thermal, Mechanical and Sound 

112.

What is the energy conversion when you plug in a stereo and listen to music?

a)

electrical to mechanical

b)

chemical to nuclear

c)

electrical to sound

d)

potential to sound

113.

What is the energy conversion when you burn wood for a fire?

a)

electrical to thermal

b)

light to kinetic

c)

chemical to thermal

d)

chemical to electrical

114.

What is the energy conversion when you put batteries in a flashlight to make it turn on?

a)

chemical to radiant

b)

radiant to kinetic

c)

chemical to thermal

d)

nuclear to radiant

115.

What is the energy conversion when you plug in a charger to charge a battery?

a)

electrical to light

b)

kinetic to potential

c)

thermal to chemical

d)

electrical to chemical

116.

What is the energy conversion when you have a skateboard at the top of the hill then move down?

a)

kinetic to potential

b)

potential to kinetic

c)

potential to thermal

d)

electrical to kinetic

117.

What is the energy conversion when a wind turbine turns to provide energy to a power grid?

a)

electrical to potential

b)

potential to mechanical

c)

mechanical to electrical

d)

nuclear to heat

118.

What is the energy conversion when you feel the warmth of the sun?

a)

radiant to thermal

b)

nuclear to mechanical

c)

potential to nuclear

d)

radiant to nuclear

119.

What is the energy conversion when you plug in a fan and it spins?

a)

potential to mechanical

b)

potential to heat

c)

heat to electrical

d)

electrical to mechanical

120.

What is the energy conversion when you eat food for fuel to go for a run?

a)

chemical to nuclear

b)

mechanical to chemical

c)

chemical to mechanical

d)

potential to chemical

121.

What is the energy conversion when you burn charcoal to cook food on a grill?

a)

thermal to chemical

b)

light to kinetic

c)

chemical to thermal

d)

chemical to nuclear

122.

What is the energy conversion when you use gasoline to make a car move?

a)

chemical to mechanical

b)

chemical to potential

c)

potential to light

d)

nuclear to mechanical

123.
what type of energy is stored in a battery?
a)
electrical
b)
chemical
c)
thermal
d)
mechanical
124.
Energy you get from eating an apple
a)
nuclear energy
b)
electromagnetic energy
c)
sound energy
d)
chemical energy
125.
Mechanical Energy is transferred to _____ Energy.
a)
Solar
b)
Mechanical
c)
Electrical
d)
Potential
126.
Electrical Energy is transferred to _____ Energy.
a)
Thermal
b)
Solar
c)
Electrical
d)
None
127.
What energy is given off when a cell phone rings?
a)
Sound Energy
b)
Gravitational Energy
c)
Thermal Energy
d)
Nuclear Energy
128.
Which energy transformation occurs in a toaster?
a)
chemical to electric
b)
electric to thermal
c)
kinetic to chemical
d)
thermal to potential
129.

What type of energy transformation occurs when using an electric pencil sharpener?

a)

electrical to mechanical

b)

sound to electrical

c)

mechanical to electrical

d)

potential to sound

130.

A lamp begins with electrical energy when plugged in and turns into _________ energy when the light comes on.

a)

mechanical

b)

kinetic

c)

radiant

d)

sound

131.

What type of energy transformation occurs when a hawk eats a mouse and then uses that energy to fly?

a)

chemical to mechanical

b)

mechanical to chemical

c)

thermal to mechanical

d)

mechanical to thermal

132.
Which of the following shows an energy transformation from chemical energy to electrical to light energy?
a)
A bolt of lightning lights the night sky.
b)
A candle glows brightly in the dark.
c)
A fire in a fireplace lights up a room.
d)
A battery causes a flashlight to shine.
133.
What energy transformations take place when a battery-operated radio is in use?
a)
Electrical to chemical to light
b)
Sound to chemical to mechanical
c)
Chemical to electrical to sound
d)
Light to electrical to thermal
134.
Which of the following devices transforms electrical energy into mechanical energy?
a)
An e-reader
b)
a fan
c)
a manual pencil sharpener
d)
ipod
135.

Which items would have this energy transformation: chemical energy -> mechanical?

a)

digesting an apple

b)

turning on a flashlight

c)

iron for your clothes

d)

a computer functioning

136.
Energy transformations occur when...
a)
energy is created through conduction
b)
energy changes from one form to another
c)
two forces slide together that are touching
d)
a chemical reaction takes place
137.

Photosynthesis goes through two energy transformations. What are the transformations?

a)

radiant

chemical

b)

chemical

radiant

c)

electrical

nuclear

d)

radiant

sound

138.
Some students observing a classroom device being used, noticed the below energy transformations. 
Electrical → Mechanical → Sound
Which device were the students most likely observing?
a)
A triple beam balance measuring an object’s mass.
b)
A pencil sharpener plugged into a wall outlet.
c)
A projector displaying a diagram on the screen.
d)
A working flashlight used to light up a dark corner.
139.
The diagram shows a circuit with the bulb glowing. How does the energy change as it moves from inside the battery, along the wires, and through the light bulb?
a)
electrical → light → chemical
b)
light → electrical → chemical
c)
chemical → electrical → light
d)
chemical → light → electrical
140.

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

141.

When water falls through a dam and turns a turbine connected to a generator, electricity is produced. The electricity is used to light a home. Which shows the energy transformation?

a)

electrical➡light➡mechanical

b)

chemical➡mechanical➡electrical

c)

mechanical➡chemical➡light

d)

mechanical➡electrical➡light

142.
What does the Law of Conservation of Energy state?
a)
That energy is the movement of electrons within an atom.
b)
That energy is a means to an end.
c)
That energy can be created when needed.
d)
That energy cannot be created or destroyed.
143.
_________ is a force that resists the sliding of two surfaces that are touching.
a)
Ficiton
b)
Friction
c)
Function
d)
Fashion 
144.
What is produced during ALL energy transformations?
a)
Sound Energy
b)
Mechanical Energy
c)
Thermal Energy
d)
Chemical Energy
145.
What is Energy?
a)
The transfer energy when a force is applied over a distance.
b)
The ability to cause change or the ability to do work.
c)
The energy of an object has because of its motion.
146.
What is thermal energy?
a)
Stored energy that is released when the nucleus of atoms are split apart or fused together.
b)
The energy due to an object's motion, position or condition. It is both kinetic and potential.
c)
The energy due to the movement of atoms or molecules that make up an object. This energy moves from warmer objects to colder objects.
d)
The energy from the sun carried by electromagnetic waves. It can move through empty space (no matter needed).
147.
What is sound energy?
a)
The energy that an electric current carries. When you plug something in, this energy flows.
b)
Energy carried in waves of vibrating matter. It cannot travel through empty space (it MUST have matter to travel)
c)
Energy stored in objects that are compressed or stretched like springs or rubber bands.
148.
What is electrical energy?
a)
The energy that an electric current carries. When you plug something in, this energy flows.
b)
Energy carried in waves of vibrating matter. It cannot travel through empty space (it MUST have matter to travel)
c)
Energy stored in objects that are compressed or stretched like springs or rubber bands.
149.
What is mechanical energy?
a)
Stored energy that is released when the nucleus of atoms are split apart or fused together.
b)
The energy formed due to an object's motion, position or condition. It is both kinetic and potential.
c)
The energy due to the movement of atoms or molecules that make up an object. This energy moves from warmer objects to colder objects.
d)
The energy from the sun carried by electromagnetic waves. It can move through empty space (no matter needed).
150.

A skydiver jumps out of a helicopter. What is happening in terms of energy?

a)

He is gaining potential energy as he falls, and losing kinetic energy.

b)

He is gaining kinetic energy as he falls and losing potential energy.

c)

His kinetic and potential energy is always the same.

d)

He is gaining kinetic and potential energy at the same time.

151.

What energy transformation occurs as a mouse produces body heat?

a)

Chemical --> Thermal

b)

Thermal --> Chemical

c)

Electrical --> Thermal

d)

Thermal --> Mechanical

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