صفحه 1:
Oitkout ۱ LDN EZ ELS
صفحه 2:
ار ۱
Oe aces eee ec e aiea an ema
عدوا
OAC oes a cans act ‘used 7 Uae ار ار
ا ا ELE 60-00 nie nae.
0
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525 ا el cm DE enc anc Oa ca
IAEA Dieta es صحادوه نا دومص "ا عون بووصذا 0
صفحه 3:
Gaergy مرا
eae ee اور مح هک (urls Por
ca eeriera ae cM nee aso cd ا 00ران
ere LRU EP EAs ED Ogee ea UE aes (Nes exc Som
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Blevtricity?
صفحه 4:
ا ۹
لت یت نیت مس مس سر ار
یلصم سم ام ا ما
ال سر رب(
دس یت و ات مر رت مر 0
xe oe Pee ric een cael ل ل
دص (
UN noe arc eed eR acdc aac an tae
صفحه 5:
OA iene rach CA need aC scl rao aoc ne eeu cies Oe
ON ee EA PANG Exec cfc es
Cae pou thick oP aay?
صفحه 6:
0 eer ae odo ad eae eed
Perini.
i cabtc at Ucn Reeth ome haan cece cas
vac are ea ae eens Pan eed ned ce ac
0 Eclat CaN Ar CANARD eh Coe
ac cach
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تمس رم مر
۱۳ مس سره
صفحه 7:
ص 2
ی حول رو
۱
۱ 7
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صفحه 8:
7 ی الى
Prva Pour diPPenedt poergy sources, vos you
Energy
Without energy nothing happens.
Energy does work!
Work is done when objects are moved or
heated.
Energy is never ‘used up’ it is simply converted
from one form to another. Can you think of
some sources of energy?
Fuels and food are sources of energy.
Can you think of any examples when energy is
converted from one form to another?
Converted Energy
Fuels for generating electricity.
There are 3 main classes of fuel which can be
used to generate electricity:
Fossil fuels, renewable fuels and nuclear fuels.
What are fossil fuels?
What are renewable fuels?
How are these fuels used to generate
electricity?
Energy is released from the fuel.
Fossil fuels such as gas, coal and oil and
renewable fuels such as wood are burnt and
heat is generated.
This heat is used to boil water and the steam that
is created is used to turn large propellers called
turbines.
These turbines then turn electrical generators.
In addition to these fuels there are other energy
sources used to generate electricity.
Can you think of any?
Other energy sources
Solar power: converts the energy of the sun into
electricity.
Wind power: Moving air can be used to turn propellers.
Hydroelectric power: using water. The higher the drop
and the greater the drop, the more energy can be
created.
Wave power: wind causes waves to form on the water
and the motion of these waves can be used to turn
generators.
What have we learnt?
Energy does work.
Energy is never ‘used up’ it is simply converted from one form
to another.
Fuels and food are sources of energy.
There are 3 main classes of fuel which can be used to
generate electricity: Fossil fuels, renewable fuels and nuclear
fuels.
Fossil fuels such as gas, coal and oil and renewable fuels such
as wood are burnt and heat is generated.
This heat is used to boil water and the steam that is created is
used to turn large propellers called turbines.
These turbines then turn electrical generators.
There are other sources of energy such as: Solar power,
wind power, hydroelectric power and wave power.
These photographs show ways of getting energy
from four different energy sources, can you
name them?
