Free Printable Energy Year 8 Revision

1.

What is energy?

a)

moving energy

b)

stored energy

c)

renewable energy

d)

The ability to do work.

2.

What is potential energy?

a)

moving energy

b)

stored energy

c)

renewable energy

d)

non renewable energy

3.

What is kinetic energy?

a)

moving energy

b)

potential energy

c)

stored energy

d)

renewable energy

4.

What is NOT a renewable energy source?

a)

coal

b)

wind

c)

solar

d)

water

5.

Which of these things is an example of potential energy?

a)

a car motor

b)

firewood

c)

battery

d)

a fan

6.

Which of these things are examples of renewable energy sources?

a)

wind

b)

solar

c)

water

d)

oil

7.

When is the potential energy the greatest in a roller coaster?

a)

a. at the bottom of the first hill

b)

b. at the top of the first hill

c)

c. at the top of the second hill

d)

d. at the bottom of the second hill

8.

When you eat fruits and vegetables, chemical bonds are releasing stored energy, this is...

a)

a. thermal energy

b)

b. sound energy

c)

c. electrical energy

d)

d. chemical energy

9.

Any time an energy conversion takes place, some of the original energy is converted to which one of the following?

a)

a. sound energy

b)

b. potential energy

c)

c. light energy

d)

d. thermal energy

10.

Which of the following is a conversion from light energy to chemical energy?

a)

a. turning on a stove to heat dinner

b)

b. turning on a lamp

c)

c. growing an apple tree

d)

d. making toast in a toaster

11.

After an energy conversion, you end up with the same total amount of energy as the original amount of potential energy. Which of the following laws explains this rule?

a)

a. law of energy changes

b)

b. law of conservation of energy

c)

c. law of power and energy

d)

d. law of potential energy

12.

Where is the potential energy the greatest?

a)

A

b)

B

c)

C

d)

D

13.

A student is holding the end of a pendulum. The student releases the pendulum. What energy transfers are taking place?

a)

potential energy is transferred to kinetic energy

b)

chemical energy to thermal energy

c)

mechanical energy to chemical energy

d)

kinetic energy is tranferred to potential energy

14.

Identify the type of energy

a)

Electrical Energy

b)

Mechanical energy

c)

Sound energy

d)

Thermal energy

15.

Identify the type of energy

a)

Thermal energy

b)

Mechanical energy

c)

Sound energy

d)

Electrical energy

16.

The process of energy changing from one form into another

a)

efficency

b)

law of conservation of energy

c)

energy transformation

d)

thermal energy

17.

Efficiency is...

a)

The percentage of energy that is actually used to do work

b)

The stuff in the walls that keeps energy in

18.

This energy comes from heat, such as geysers, beneath earth’s surface.

a)

Biomass

b)

Geothermal

c)

Solar

d)

Oil

19.

Sailboats, kites and mills use this kind of energy.

a)

Propane

b)

Nuclear

c)

Wind

d)

Oil

20.

Total energy = 200J
Useful energy = 20J

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

a)

100%

b)

80%

c)

40%

d)

10%

21.

A lightbulb with efficiency of 10% would be

a)

efficient

b)

inefficient

22.

Total energy = 350J
Useful energy = 70J

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

a)

100%

b)

80%

c)

40%

d)

20%

23.

Total energy = 1000J
Useful energy = 1000J

Workout the efficiency of this hairdryer.
$efficiency\ =\ \frac{useful\ energy}{total\ energy\ in\ }\ \times100\%$

a)

100%

b)

50%

c)

40%

d)

20%

24.

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

25.

Where does most of the energy go in this transformation.

a)

Electrical energy

b)

Light

c)

Heat

d)

other

26.

What type of device might this Sankey be about?

a)

A very efficient LED light bulb

b)

A very inefficient incandescent light bulb

c)

A coal power plant

d)

A wind turbine

27.

Where does most of the energy go for this transformation.

a)

heat

b)

electrical

c)

light

d)

joules

28.

Which fraction best describes, of the part of the gasoline that is put into a car, that actually makes the car move.

a)

4/10

b)

1/4

c)

2/4

d)

3/5

29.

The energy efficiency shown in this diagram is:

a)

About 10%.

b)

About 30%.

c)

About 60%.

d)

Impossible to tell.

30.

Someone made this diagram for an energy efficiency of 45%. What's the biggest mistake they made?

a)

The arrows are the same colour.

b)

The top arrow is too small.

c)

The diagram is unlabeled.

d)

The diagram is not correctly proportioned.

Energy Year 8 Revision

Total questions: 30

Worksheet time: 16mins

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