Prepare to Learn – Crack the Code!

1. Prepare to Learn – Crack the Code! If a = 1, b = 2, c = 3 and so on Crack the code to find today’s key words: 3-15-1-12 14-21-3-12-5-1-18 19-15-12-1-18 23-1-22-5 23-9-14-4 2-9-15-6-21-5-12 7-5-15-20-8-5-18-13-1-14

2. Lesson Title Generating Electricity

3. Objectives – the next 3 lessons • You will be able to evaluate different methods of generating electricity • You will be able to find ways of matching supply with demand either by increasing supply or decreasing demand • You will be able to compare the advantages and disadvantages of overhead power lines and underground cables.

4. Present New Informationtypes of Power Station #1 • Power stations that heat water to produce steam • Fuels used include • Fossil fuels (coal, oil, gas) • Bio-fuels • Nuclear Fuels (uranium, plutonium)

5. Generating electricity from fossil fuels and biofuels

6. Labelling parts of power station

7. Model of Heat power Station using Steam Engine • What energy changes are involve • Use a safety screen

8. How is electricity generated?

9. Groups Solar power Tidal power Wave power Wind turbines Nuclear power Fossil fuels Biofuels Geothermal You need to create a poster on your given power source, to include: How the power is generated Advantages Disadvantages (think social, economic, environmental)

11. How does nuclear power work?

12. Mini Review Login to Kerboodle http://live.kerboodle.com/NT3/NTLS_RootRepository/ContentPackages/269/new_aqa_sci_online_psf_release71/product/phys_gc_1102_launch.htm Sheet 1 = F Sheet 2 = H

13. Present New Informationtypes of Power Station #2 • Power stations that use running fluids to produce electricity • These include • Hydroelectric Power Stations (falling water) • Tidal • Wave • Wind

14. However, some people consider this source of renewable energy to be noisy and an eyesore. There is also some concern that, if wind turbines are poorly located, they could kill migrating birds. How do wind turbines work? Wind turbines have large blades that capture the kinetic energy of the wind. This kinetic energy is used directly to turn the turbine and generate electricity. Wind turbines are a source of 'clean energy’ as they do not produce any polluting waste.

15. How does a hydroelectric dam work?

16. How does wave power work?

17. How does tidal power work?

18. Model of Flowing Water Power Station • What are the energy changes involved

19. Present New InformationTypes of Power Station #3 • Electricity can also be produced directly from the sun’s rays • This is what a Solar Cell does

20. How do solar cells work?

21. Present New InformationTypes of Power Station #4 • Electricity can also be produced from hot rocks deep underground • They are hot because they are radioctive • This is what a Geothermal power station does

22. How does a Geothermal Power Station work

23. Construct • Solar Cell Investigation • Practical Sheet (H & F) • Help Sheet (F) • Homework Sheet on comparing power stations

24. Mini Review/Second lesson Starter (High, Medium or Low)

25. Present New Information Pump Storage at Dinorwig (Wales)

26. Present New Information • Between 1976 and 1982 at Dinorwig, in North Wales, a huge project was built. Yet there's little to see as you drive past, as most of it is deep inside a mountain. • Water is pumped up to the top reservoir at night, when demand for power across the country is low. When there's a sudden demand for power, the "headgates" (huge taps) are opened, and water rushes down the tunnels to drive the turbines, which drive the powerful generators.The water then collects in the bottom reservoir, ready to be pumped back up later. Dinorwig has the fastest "response time" of any pumped storage plant in the world - it can provide 1320 MegaWatts in 12 seconds. That's a lot of cups of tea!  

27. Presenting New Information • Electric Mountain Part1 (skip first 5 mins) http://www.youtube.com/watch?v=j1ho2yCvOXo&feature=related • Electric Mountain Part 2 http://www.youtube.com/watch?v=7VONAYCsLRc&feature=related • The End Of Eastenders!! http://www.youtube.com/watch?v=UTM2Ck6XWHg&feature=player_embedded#!

28. Daily Variation of Electrical Demand

29. Daily Variation of Electrical Demand Q Why do you think the daily demand is lower on a Saturday A Factories, schools etc closed Q Why do both lines go up between 7 am and 9 am A People getting up/breakfast/work starting Q Why a mini peak at about 6 pm A Getting home/switch on cookers/lights etc Q How could we get people to switch their use of electricity to night-time A Offer electricity at a cheaper rate Q How would the demand change if this was January instead of July A Demand would increase, darker/colder so more light/heat needed

30. Overground Cables • Cheapest option • Use Aluminium cables (light and good conductor) • Easy to get at to repair • Damaged by extreme weather • Visual eyesore • Kills kite flyers

31. Underground Cables • Cannot see them • Public can’t touch accidently • Not damaged by extreme weather • More expensive • Diggers could accidently cut them • Need to dig them up to repair

32. Apply to Demonstrate • Power Station Presentation • Presentation (H & F) • Summary Grid (F) • Model/Poster/Powerpoint to support presentation (Optional)

33. Reflection on Your Learning • I can compare different methods of generating electricity giving their pros and cons    • I know how the countries power suppliers find ways of matching supply with demand either by increasing supply or decreasing demand    • I can compare the advantages and disadvantages of overhead power lines and underground cables.   

34. Thinking Hats Review • The facts I have learned are……… • The way I feel is ……………. • I suggest that …………. • The problems I face are ………………. • The positive things are …………….. • I now plan to ………