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Energy, work & power revision

Total questions: 124

Worksheet time: 2hrs 4mins

Name
Class
Date
1.
__________ is an energy resource that WILL run out in the next several hundred years.
a)
Renewable Energy Resource
b)
Nonrenewable Energy Resource
c)
Fossil Fuels
d)
Forever Fuels
2.
__________ is an energy resource that WILL NOT run out in the next several hundred years.
a)
Renewable Energy Resource
b)
Nonrenewable Energy Resource
c)
Fossil Fuel
d)
Forever Fuel
3.
Coal is a __________ energy resource.
a)
Renewable
b)
Nonrenewable
4.
Solar Power is a __________ energy resource.
a)
Renewable
b)
Nonrenewable
5.
Natural Gas is a __________ energy resource.
a)
Renewable
b)
Nonrenewable
6.
Oil is a __________ energy resource.
a)
Renewable
b)
Nonrenewable
7.
Geothermal Power is a __________ energy resource.
a)
Renewable
b)
Nonrenewable
8.
Wind is a __________ energy resource.
a)
Renewable
b)
Nonrenewable
9.
Why are fossil fuels like coal, oil, and natural gas called nonrenewable resources?
a)
a.  They can never be replaced.
b)
a.  They cannot be easily replaced.
c)
a.  They can be recycled.
d)
a.  They can be made in factories.
10.
Some power plants pump water down deep holes into hot rock. The hot rock heats the water, which turns the water into steam. The steam rushes back to Earth’s surface and is used to make electricity. This plant is generating which alternative energy resource?
a)
biomass
b)
wind
c)
solar energy
d)
geothermal energy
11.
Biomass
a)
Renewable
b)
Nonrenewable
12.
Nuclear
a)
Renewable
b)
Nonrenewable
13.
What characteristic do all renewable resources share?
a)
Produced by waste products
b)
Form underground from dead organisms.
c)
Replaced in a short period of time
d)
Allow energy to pass through them easily
14.

Use the diagram to put the steps below in the correct order to describe how electrical energy is generated in an electrical power plant.

  1. Electricity is generated.
  2. Magnet spins between wire coils.
  3. Water is heated and changes to steam.
  4. Steam makes turbine spin.
  5. Fossil fuel is burned.
a)

Steps 1, 3, 4, 2, then 5.

b)

Steps 5, 2, 4, 3, then 1.

c)

Steps 5, 3, 4, 2, then 1.

d)

Steps 1, 2, 4, 3, then 5.

15.

What happens to fossil fuels to create electricity?

a)

They are stored

b)

They are burned

c)

They are melted

d)

They are frozen

16.

In a power station, what causes the turbine to turn?

a)

Heat

b)

Gas

c)

Air

d)

Steam

17.

Why are coal, oil, and natural gas classified as nonrenewable resources?

a)

They are limitless

b)

They exist in many places on Earth.

c)

They are originally from once-living things.

d)

They take millions of years to form.

18.

One benefit of geothermal energy is that ________________________________.

a)

a plant can be built ANYWHERE

b)

it doesn't cost a lot of money to build

c)

it can provide power 24 hours a day

d)

it harms ecosystems where it's built

19.

Which of these is a true statement about nuclear power?

a)

It's waste can destroy habitats and ecosystems.

b)

It doesn't cost a lot of money to build.

c)

It does not produce radioactive waste.

d)

It produces very little amounts of energy.

20.

Which statement is true about coal and natural gas?

a)

Both are renewable resources

b)

Both require wind in order to work

c)

Both lead to greenhouse gases and climate change

d)

Neither one causes global warming

21.

What is a disadvantage to Hydroelectricity?

a)

lots and lots of pollution

b)

Kills wild bird population

c)

Radioactive waste

d)

Increases potential for flooding

22.

What are two advantages of geothermal energy?

a)

cheap and a lot pollution

b)

expensive and a lot of pollution

c)

cheap and little pollution

d)

expensive and little pollution

23.

If a river is located in a deep canyon, and has changing amounts of water , how can this be developed as an energy source?

a)

A dam could be built to store water

b)

A well could be dug to hold the water

c)

Wind turbines could be built on the banks.

24.

Which of these is NOT a disadvantage of a nuclear power plant?

a)

It's waste can destroy habitats and ecosystems.

b)

It costs a lot of money to build.

c)

It produces radioactive waste.

d)

It produces large amounts of energy.

25.

Another advantage of using hydropower is that

a)

it's able to produce a steady flow of energy 24 hours a day

b)

it's very cheap to build a dam

c)

no ecosystems are destroyed by damming up a river

d)

dams cause flooding

26.

What are the 3 MAIN types of fossil fuels?

a)

Coal - Oil - Nuclear

b)

Coal - Oil - Solar

c)

Oil - Coal - Gas

27.

Wind energy

a)

is less expensive than fossil fuels

b)

is difficult to utilize in areas with low wind availability

c)

is a renewable source of energy

d)

utilizes small or large areas of land not previously used

28.
Which is an advantage of installing solar panels?
a)
Reduced amount of air polllution
b)
High cost to install
c)
Number of cloudy days
d)
Use of nonrenewable resources
29.
The energy resource that is most affected by change in weather is_____________?
a)
geothermal 
b)
wind
c)
nuclear
d)
natural gas
30.

A cyclist at the top of a hill has...

a)

Kinetic Energy

b)

Chemical Potential Energy

c)

Elastic Potential Energy

d)

Gravitational Potential Energy

31.

Humans get their energy from...

a)

Chemical Potential Energy

b)

Thermal Energy

c)

Kinetic Energy

d)

Nuclear Energy

32.

Energy Stored in an atoms nucleus is..

a)

Atomic Energy

b)

Electrostatic Energy

c)

Nuclear Energy

d)

Elemental Energy

33.

Energy stored in objects being stretched or squashed...

a)

Elastic Potential Energy

b)

Kinetic Energy

c)

Chemical Energy

d)

Thermal Energy

34.
What type of energy is stored in food and fuel?
a)
Chemical
b)
Thermal
c)
Potential
d)
Calories
35.
What type of energy transfer is most likely responsible when a plant converts the suns energy into food?
a)
Chemical to Solar
b)
Solar to chemical
c)
Light to electrical
d)
Electrical to chemical
36.

Identify the energy transfer

a)

electrical to chemical to light

b)

kinetic to potential

c)

chemical to electrical to light

d)

light to sound

37.
Energy of motion is which type of energy?
a)
Potential
b)
Kinetic
c)
Sound
d)
Gravitational
38.
When plants convert the sun's energy into food, which type of energy is it?
a)
kinetic
b)
chemical
c)
thermal
d)
radiant
39.
What kind of energy is represented in this picture?
a)
Thermal
b)
Potential
c)
Nuclear
d)
Mechanical
40.
When an object is moved to a higher position, what name is given to the energy it then stores?
a)
Gravitational Potential
b)
Elastic
c)
Height
d)
Kinetic
41.
According to which law of energy, energy can't be created or destroyed?
a)
First law of motion
b)
The law of tacos
c)
Laws of Energy
d)
law of conservation of energy
42.

Type of energy?

a)

Electrical

b)

Chemical

c)

Mechanical

d)

Nuclear

e)

Thermal

43.

The picture demonstrates chemical energy transforming into ...(pick 3)

a)

radiant energy

b)

sound energy

c)

thermal energy

d)

kinetic energy

e)

potential energy

44.

Energy can be stored in different ways. A moving object has energy in its __________ energy store.

a)

Thermal

b)

Chemical

c)

Kinetic

d)

Gravitational potential

e)

Elastic potential

45.

Energy can be stored in different ways. The temperature of an object depends on the amount of energy it has in its __________ energy store.

a)

Thermal

b)

Chemical

c)

Kinetic

d)

Gravitational potential

e)

Elastic potential

46.

Energy can be stored in different ways. A compressed or stretched object that can return to its original shape has energy in its __________ energy store.

a)

Thermal

b)

Chemical

c)

Kinetic

d)

Gravitational potential

e)

Elastic potential

47.

Energy can be stored in different ways. An object raised above the ground has energy in its __________ energy store.

a)

Thermal

b)

Chemical

c)

Kinetic

d)

Gravitational potential

e)

Elastic potential

48.

Cells and batteries have most of their energy in their __________ energy store.

a)

Thermal

b)

Chemical

c)

Kinetic

d)

Gravitational potential

e)

Elastic potential

49.

A student picks up a book off the floor and puts it on a high shelf. Which energy store has been filled /increased in this process?

a)

Thermal

b)

Chemical

c)

Kinetic

d)

Gravitational potential

e)

Elastic potential

50.

There are different ways that energy can be transferred from one energy store to another. Energy is transferred __________ when there is a difference in temperature between two objects.

a)

By electrical current

b)

By heating

c)

Mechanically (by forces)

d)

By radiation/waves (light, sound, etc.)

51.

Energy is transferred __________ when a wave (e.g. visible light or infrared) transfers energy from an object to its surroundings.

a)

By electrical current

b)

By heating

c)

Mechanically (by forces)

d)

By radiation/waves (light, sound, etc.)

52.

Energy is transferred __________ when a force moves an object through a distance.

a)

By electrical current

b)

By heating

c)

Mechanically (by forces)

d)

By radiation/waves (light, sound, etc.)

53.

What type of energy is stored in a parcel on a shelf?

a)

Kinetic

b)

Gravitational potential

c)

Elastic potential

d)

Chemical

54.

What energy changes take place when a car rolls down the hill?

a)

Chemical to thermal

b)

Gravitational to kinetic

c)

Electrical to kinetic

d)

Electrical to sound

55.

An electric blender makes a smoothie

a)

Chemical to thermal

b)

Gravitational to kinetic

c)

Electrical to kinetic

d)

Electrical to sound

56.

An radio is playing a song

a)

Chemical to thermal

b)

Gravitational to kinetic

c)

Electrical to kinetic

d)

Electrical to sound

57.

A candle burns

a)

Chemical to thermal

b)

Gravitational to kinetic

c)

Electrical to kinetic

d)

Electrical to sound

58.
The law of conservation of energy states that when one form of energy is converted into another,
a)
energy is destroyed in the process
b)
no energy is destroyed in the process
c)
energy is created in the process
d)
some amount of energy cannot be accounted for
59.
A material that reduces or prevents the transfer of energy.
a)
conductor
b)
conduction
c)
radiation
d)
insulator
60.
Efficiency is...
a)
The percentage of energy that is actually used to do work
b)
The stuff in the walls that keeps energy in
61.
Electrical Energy is transferred to _____ Energy.
a)
Thermal
b)
Solar
c)
Electrical
d)
None
62.

5 kJ is the same as

a)

0.005 W

b)

5000 J

c)

0.005 J

d)

5000000 J

63.

A cyclist waiting at the top of a hill has...

a)

Kinetic Energy

b)

Chemical Energy

c)

Elastic Energy

d)

Gravitational Energy

64.
What type of energy is stored in food and fuel?
a)
Chemical
b)
Thermal
c)
Potential
d)
Calories
65.
What is an energy transfer?
a)
Dancing 
b)
Movement of energy
c)
Movement of energy from one store to another
d)
something moving
66.

A car transfers 100 J of chemical energy in order to gain 50 J of kinetic energy. The efficiency of the car is

a)

20%

b)

0.5%

c)

50%

d)

200%

67.

Which of these equations is correct?

a)

efficiency = useful energy transferredtotal energy transferredefficiency\ =\ \frac{useful\ energy\ transferred}{total\ energy\ transferred}  

b)

efficiency = total energy transferreduseful energy transferredefficiency\ =\ \frac{total\ energy\ transferred}{useful\ energy\ transferred}  

c)

energy = efficiency ×100%energy\ =\ efficiency\ \times100\%  

d)

efficiency = wasted energy transferredtotal energy tranferredefficiency\ =\ \frac{wasted\ energy\ transferred}{total\ energy\ tranferred}  

68.

Total energy = 200J
Useful energy = 20J

Workout the efficiency of this lightbulb.
efficiency = useful enegytotal energy in ×100efficiency\ =\ \frac{useful\ enegy}{total\ energy\ in}\ \times100  

a)

100%

b)

80%

c)

40%

d)

10%

69.

Total energy = 350J
Useful energy = 70J

Workout the efficiency of this iphoneX.
efficiency = useful energytotal energy in ×100%efficiency\ =\ \frac{useful\ energy}{total\ energy\ in}\ \times100\%  

a)

100%

b)

80%

c)

40%

d)

20%

70.

Total energy = 34000J
Useful energy = 340J

Workout the efficiency of this vintage VW Beetle.
efficiency = useful energytotal energy in ×100%efficiency\ =\ \frac{useful\ energy}{total\ energy\ in}\ \times100\%  

a)

100%

b)

10%

c)

40%

d)

20%

71.

This car needs 8600J of energy to power it. If 5000J is changed into useful energy, how much energy is wasted?

a)

13600J

b)

3600J

c)

5000J

d)

8600J

72.
What is the efficiency of the machine if the input is 263 J and the output is 142 J? 
a)
6.26%
b)
54%
c)
100%
d)
260%
73.

What is the work output of a machine that has a work input of 2,800 Joules and an efficiency of 90%?

a)

25200 J

b)

2520 J

c)

0.0082J

74.

Energy stored because of gravity is called:

a)

Gravitational Potential Energy

b)

Kinetic Energy

c)

Mechanical Advantage

d)

Chemical Energy

75.

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

a)

A

b)

G

c)

D

d)

C

e)

G

76.

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

77.

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

78.

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

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.

At which position does the child on the swing have the most gravitational potential energy?

a)

W

b)

X

c)

Y

d)

Z

81.

At which point on the roller coaster is the gravitational potential energy the greatest?

a)

W

b)

X

c)

Y

d)

Z

82.

What kind of energy is in a rock at the edge of a cliff?

a)

Gravitational Potential Energy

b)

Kinetic Energy

c)

Both potential and kinetic energy

d)

none of the above

83.

Which is the correct unit for expressing gravitational potential energy?

a)

Joule

b)

Newton

c)

m/s2

d)

meter

84.

What is the gravitational potential energy (GPE) of a 1 kilogram book that is 1 meter above the ground?

g = 9.8 m/s2

a)

9.8 Joules

b)

1.0 Joule

c)

0.10 Joule

d)

11.8 m/s2

85.

Which 2 items does gravitational pull depend on?

a)

Mass (weight)

b)

Speed

c)

Height / Distance from the ground

d)

Force

86.

True / False: The heavier an object is, the more potential energy the object has.

a)

True

b)

False

87.

If a falling ball has, at one point in its fall, 20 J of gravitational potential energy and 60 J of kinetic energy, how much kinetic energy will it have when it strikes the Earth?

a)

80 J

b)

60 J

c)

20 J

d)

40 J

88.

Which of the following is true?

a)

Energy is found only in living objects

b)

Energy is a fuel

c)

Energy is a substance or fluid

d)

Energy is associated only with movement

e)

Any store of energy may be transferred into another store

89.

Convert 0.78 kilojoules to joules.

a)

7,800 joules

b)

780 joules

c)

78 joules

d)

7.8 joules

e)

0.078 joules

90.

A science student holds a 55g egg out a window. Just before the student releases the egg, the egg has 8.0J of gravitational potential energy with respect to the ground. How far is the students arm fro the ground in meters?

a)

15m

b)

17m

c)

8m

d)

19m

91.

A diver has 3400J of gravitational potential energy after stepping up onto a diving platform that is 6 meters above the water. What is the divers mass in kilograms?

a)

85kg

b)

64m

c)

58kg

d)

None of the answers are correct

92.
Energy due to motion is ____________ energy. 
a)
Potential 
b)
Energy
c)
Kinetic
d)
Friction
93.
The faster an object moves, the ________ kinetic energy it has. 
a)
more
b)
less
c)
none of the above
d)
all of the above 
94.
As mass increases, KE ...
a)
increases
b)
decreases
c)
stays the same
95.
The SI unit in which kinetic energy is measured is 
a)
Newton
b)
Kilogram
c)
Joules
d)
Metres per second
96.
Rearrange the equation for kinetic energy to make mass the subject of the equation.
a)
m = KE/2v2
b)
m = 2KE/v2
c)
m = v2/2KE
d)
m = 2v2/KE
97.
Rearrange the equation for kinetic energy to make velocity squared the subject of the equation.
a)
v2 = KE/2m
b)
v2 = 2m/KE
c)
v2 = 1/2 KE m
d)
v2 = 2KE/m
98.
Rearrange the equation for kinetic energy to make velocity the subject of the equation.
a)
v = √(2KE/m)
b)
v2 = 2KE/m
c)
v = √(m/2KE)
d)
v = √(KE/2m)
99.
Calculate the kinetic energy of a moving 4 kg object travelling at a velocity of 3 m/s.
a)
18 J
b)
36 J
c)
12 J
d)
6 J
100.
How much kinetic energy does a moving 6 kg object have if it moves with a velocity of 3 m/s?
a)
27 J
b)
18 J
c)
9 J
d)
2 J
101.
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
102.
What is the kinetic energy of a ball with a mass of 5kg rolling at 10m/s
a)
50 J
b)
5 J
c)
250 J
d)
25 J
103.
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
104.
A rabbit of mass 3kg walks at a speed of 0.5m/s. Calculate its kinetic energy.
a)
0.5 J
b)
0.75 J
c)
0.255 J
d)
0.375 J
105.
An 8kg dog chases a cat. if the dog has 400J of kinetic energy. What is the speed of the dog?
a)
10 m/s
b)
5 m/s
c)
1 m/s
d)
100 m/s
106.

What two factors affect an object's kinetic energy?

a)

area and volume

b)

mass and weight

c)

weight and height

d)

mass and speed

107.

Where would this tossed baseball have the least amount of kinetic energy?

a)

point W

b)

point X

c)

point y

d)

point z

108.

Increasing an object's mass will increase its kinetic energy.

a)

true

b)

false

109.

Increasing an object's speed will increase its kinetic energy.

a)

false

b)

true

110.

What is the formula for Kinetic Energy?

a)

S = d / t

b)

KE = 1/2 * m * v2

111.

A 65,000 kg train travels to New York at 24 m/s. What is the train's Kinetic Energy?

a)

2708.9 m/s

b)

65,000 kg

c)

24 m/s

d)

18,720,000 J

112.

Which is the best example that something has kinetic energy?

a)

a car parked on a steep hill

b)

a tennis ball rolling across the court

c)

a picture hanging on the wall

d)

a piece of coal before it's burned

113.

Which of the following are examples of kinetic energy? (check all that apply)

a)

an arrow flying through the air

b)

a book on a shelf

c)

kicking a soccer ball

d)

chewing gum

e)

sitting at a stop light

114.
Is the amount of energy being transferred over a period of time.
a)
Power
b)
Energy
c)
Seconds
d)
Joules
115.
What is the unit of measurement for power?
a)
Joules
b)
Watts
c)
Voltage
d)
Calories
116.
A microwave has a power rating of 1550 W. How much energy does it transfer per second?
a)
1.550 Joules
b)
15.50 Joules
c)
155.0 Joules
d)
1550 Joules
117.
A kettle transfers 1000J of energy every 2 seconds. Calculate its power.
a)
2000 Watts
b)
1000 Watts
c)
500 Watts
d)
cannot be determined
118.

What is needed calculate power?

a)

work

b)

time

c)

mass

d)

distance

119.

Two workers use 100 N of force to move a sofa 2 meters in 2 seconds. How much power is required?

a)

100 watts

b)

400 watts

c)

104 watts

d)

50 watts

120.
If 68 W of power is produced in 18 seconds, how much work is done?
a)
1,224 J
b)
0.264 J
c)
3.77 J
d)
12.24 J
121.
How much time is needed to produce 720 Joules of work if 90 watts of power is used? 
a)
0.125 s
b)
8 s
c)
64800 s
d)
80 s
122.
What is power?
a)
transfer a force through a distance
b)
the rate of speed 
c)
the rate of work being done
d)
transfer of space over time
123.

If you increase your work and decrease your time, you will have

a)

more power

b)

less power

c)

same amount of power

d)

power rating can not be determined

124.

Person A and Person B are both using the same amount of work to lift something. Person A takes half as much time to do it. Who has greater power.

a)

Person A

b)

Person B

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