1. 111 things I need to know about...Energy
1-9. List all 9 energy types and 10-27. Give 2 examples of each energy type (one
example has been given).
Energy type Example
Nuclear Power station, bomb.
28-36. Complete these useful energy transfers (one example has been give):
electrical light and sound
_________ _____________ and __________
_________ ___________
_________ _____________
_________ ____________
36-51. Create your own useful energy transfer diagrams for these devices (on the
back of this sheet):
A) Headphones
B) Mobile phone charger charging a battery in a phone
C) A light bulb
D) A kettle
E) A ringing mobile ‘phone.
52-56. Complete this table to show how much energy is transferred. The first
example has been done for you.
Machine/device Useful output energy Wasted output energy
Kettle 98% 2%
Light bulb 5%
Gas cooker 50%
Headphones 90%
Bunsen burner 36%
57- 66. Complete these sentences, using the words below:
Gravitational potential, (J), Joules, kinetic, chemical, kinetic, light, chemical,
gravitational potential.
a) Energy is measured in a unit called ____________.
b) The symbol for the unit of energy is ___________.
c) A solar panel absorbs ________ energy from the sun.
d) A solar panel stores the light energy in its batteries/cells as
______________ energy.
e) Water at the top of a waterfall has _______________ energy.
f) As water flows over a waterfall it has _____________ energy.
g) The type of energy our muscles need to work and get from food is
___________ energy.
h) When lifting an object we use ___________________ energy.
i) A lifted object high up has _______________________ energy.
67-72.
a) What type of energy does a moving bike have? ______________
b) When the breaks are applied to the wheels of a bike, friction between the
brake pad and the wheel slow it down. But what energy type is the kinetic
energy converted to? ____________
c) Draw an energy conversion diagram of these changes that happen when a
bike slows down because of braking:
73-81. Look at the graph below which shows the output of a solar panel on a sunny
spring day. What can you say about the energy output (use numbers from the
graph and describe the pattern):
a) Between 9pm and 5am?
_______________________________________________________
_______________________________________________________
b) Between 5am and 10am?
_______________________________________________________
_______________________________________________________
c) Between 10am and 4pm?
_______________________________________________________
_______________________________________________________
82-90. On the graph draw and label 2 curves. One curve should show the energy
output of the solar panels on a darker winter day. Label this curve ‘winter’ day. The
other curve should show the sunniest summer day. Label this curve ‘summer day’.
90-111. Sankey diagrams show how much energy is transferred as useful and
wasted energy. An example is given below:
On graph paper, draw Sankey diagrams for these machines/devices:
1.2
1.0
0.8
0.6
0.4
0.2
0
energy
output
(kJ/s)
2am 4am 6am 8am 10am noon 2pm 4pm 6pm 8pm 10pm 12pm
tim e of day
Battery-powered
torch
1000J chemical 800J light
200J heat (wasted)
Battery powered
watch
500J chemical 400J kinetic
100J heat (wasted)
Wind-up toy car 100J elastic potential 90Jkinetic
10J wasted (sound)
T.V
Hair drier
Gas cooker
Wind-up toy car
Battery-powered
radio