Alternative sources of energy

صفحه 1:


صفحه 2:
Lessvu ‏رشان‎ © ‏یا ایند ۱" مها نا جر لمج دزا رر8)‎ uble to oPPer oo exphocaica Por the ceed to use dhercoive svurces ve 2۳۷۳ ‎wet?‏ 1 رن و ‎ ‎ ‎ ‎ 

صفحه 3:
ام انوم الم 

صفحه 4:
‎ceed Por dercuive‏ وه ‎there‏ & روا ‎SOW ED DF BvErtp?‏ ‎ ‎9 Dre yrupk that pou cowpleted bust five shows just ‎® 90 per vest oP the works coer suppl’s ‏دمج‎ ‎Prow Possil Puts ‎° (Possil Ruel ure po wedied oad reloively cheap — 0 fice DP petrol in (OSCO would kuve beed OOp ‏خا‎ ‎there woe uv tox added! 

صفحه 5:
23 2۵ 75 76 77 18 79 890 91 82 83 34 85 66 87 88 89 9091 92 93 94 95 96 97 98 اندجت انه 0ه 1۳900 

صفحه 6:
Posoll Puck? ‎Because they ure Possil Purl they DO kave o tPe‏ و ‎Experi‏ ‎° “Ol kas PO — GO peas teh” ‎© ‏با‎ 1990 they suid this tov! — What hos hopped is thot we hove Pourd aew reserves oF oil ood ce 

صفحه 7:


صفحه 8:
Q@urcicg Possil Puels kos ‏.دع ان تصصام‌جمموت لوصو‎ ]0( poutribute to avid ra wore sv thoa power stoicos burciey cool. ke carbo stored ta Poseil Pues te released us ‏ماو‎ ‎dioxide wheo they ore bora — this beads to the ued house ePPen ued gobal wareviery Oowt yet this cooP used with the Kole to the vue hyer — this ws onused by CPC's 

صفحه 9:


صفحه 10:
٠ Cod! kus the ragest iPe expecta Buel the wost us if yives DPR the wost COO اس و امه رس 0 عورش-صله موم حوطله() ۰ سوم - ‎use‏ وا نا موجه من ص ‎there is tkely to‏ ابا ه ‎Prow sia whick kus‏ 

صفحه 11:


صفحه 12:
Go whet ure the dercaive ever sources to Poss Pues? Ouse upon a koe — wuskur power wee sera us he neuer. Thine snes OP power could be produced Pow 0 seal ozuat oF ‏مخت‎ ‎* Wowever, tvs oot well koow thot it produced radicariive waste © De woste tp doogercus ty heathy ord He Por ‏للم‎ oP peas ‎bp w seo phor Por storage.‏ یا و ‎©» ‏موه عم امین رل‎ beeu shotered by the explosicg of Oherabyl tt 999 

صفحه 13:


صفحه 14:
Oker hopes? QOow thot curtear power is vowsidered tov risky hopes fe Luis this like uct, wwoter, wied, waves ord 

صفحه 15:
Reservoir Water ‘behind the dam 198 forward at igh pressure fiow through the dam at high speed The Turbines are like big propeliers. They are place in the middie of each to the generators, The Generators produce the electricity. Each generator connected by a drive shaft to a turbine. Exhaust Water continues on down the river. 

صفحه 16:


صفحه 17:


صفحه 18:
4. Turbine drives generator which produces electricity. 3. Air flow turns turbine. 2. Reduced volume compresses air. 

صفحه 19:
Q@wWwoatages oP using woturd svurves DP every 9 Dkep ure itexhcustible — they wil ohuaps be wwoiloble — they are necewuble 9 Dkev oe cleoo ord wil oot dawage the arth © rere ore severd types — sv vor or wore of thew is presed ia euck pouty ° Oost woturd sources oot be used ooo scvdll soote ed serve loo ueeds therefore ‏اوه بوشه‎ irons witiogy the POET 

صفحه 20:
© Exphaia why Possi Poets are: ® (3) chew ® (6) ia kevited supply نفك (ه) * 

صفحه 21:
ut Porwerd orcgecveds ta Pavour ve 9 (a) Osta ‏موه كدي انهه‎ oP cool © (b) wie cucleur power roker tho vil ° (7) ute chercaive sources oP roeryy rather thot ‏لیم‎ 

Alternative sources of energy Lesson Objective  By the end of this lesson I will be able to offer an explanation for the need to use alternative sources of energy  Target 1 met? What is an alternative source of energy?   An energy source that can be used instead of fossil fuels It is usually a renewable source of energy that could be used should fossil fuels run out Why is there a need for alternative sources of energy?  The graph that you completed last time shows just how much we rely on fossil fuels  90 per cent of the worlds energy supply’s come from fossil fuels  Fossil fuels are convenient and relatively cheap – a litre of petrol in 1998 would have been 20p if there was no tax added! How much longer can we depend on fossil fuels?  Because they are fossil fuels they DO have a life expectancy  “Oil has 40 – 50 years left”  In 1960 they said this too! – what has happened is that we have found new reserves of oil and new technology has made the oil we use last longer     Burning fossil fuels has increased atmospheric pollution. Vehicle exhausts contribute to acid rain more so than power stations burning coal. The carbon stored in fossil fuels is released as carbon dioxide when they are burnt – this leads to the green house effect and global warming Don’t get this confused with the hole in the ozone layer – this was caused by CFC’s The Green House Effect  Coal has the longest life expectancy  Environmentalists dislike the burning of this fossil fuel the most as it gives off the most CO2  Unless cheap alternatives to burning coal are found there is likely to be an increase in its use – especially from Asia which has a lot! So what are the alternative energy sources to fossil fuels?      Once upon a time – nuclear power was seen as the answer. Huge amounts of power could be produced from a small amount of uranium However, it was not well known that it produced radioactive waste The waste is dangerous to health and life for hundreds of years There is no secure place for storage. Public confidence has also been shattered by the explosion at Chernobyl in 1986 Other hopes?  Now that nuclear power is considered too risky hopes lie with things like sun, water, wind, waves and tides. Advantages of using natural sources of energy  They are inexhaustible – they will always be available – they are renewable  They are clean and will not damage the Earth  There are several types – so one or more of them is present in each country  Most natural sources can be used on a small scale and serve local needs therefore cutting costs of transmitting the energy Review  Explain why fossil fuels are:  (a) cheap  (b) in limited supply  (c) dirty Put forward arguments in favour of:  (a) Using natural gas instead of coal  (b) using nuclear power rather than oil  (c) using alternative sources of energy rather than nuclear power