Physics chapter 3 0.0 / 5 ? PhysicsEnergyGCSEAQA Created by: abiiwelshCreated on: 22-06-18 18:07 What are the advantages of wind energy? Renewable, no fuel costs, no pollutants produced 1 of 28 What are disadvantages of wind energy? Eyesore, noisy, unreliable 2 of 28 How does a wave generator produce energy? Waves generator uses waves to make floating generator move up and down- turns generator- electricity- cable to shoreline 3 of 28 What are disadvantages of wave power? Don’t produce constant supply, spoil coastline, change tidal flows (affect habitat) 4 of 28 Disadvantage of hydroelectric power? Damns are expensive, flood land- nature, not collect enough rain 5 of 28 How does tidal power work? Trap water from tide behind barrage- released through turbines- generator or water through undersea turbines 6 of 28 Why are narrow barrages effective? As more water enters, water levels rise quicker 7 of 28 What is a solar panel? Many solar cells together, which convert suns energy into electricity 8 of 28 What might solar panels be used for? Small devices or remote places 9 of 28 What are disadvantages of solar panels? Expensive, need lots of them, unreliable 10 of 28 What is a solar power tower? Many mirrors surrounding water tower- heat water to steam, steam flows down to turn generator 11 of 28 How much power can solar power tower produce? 20 MW (20 million watts) hot, dry 12 of 28 Where is geothermal energy from? What substance? Radioactive substance in Earth 13 of 28 How does geothermal energy work? Water pumped to rocks (which are heated by radioactive), steam, drive turbines, turn generator 14 of 28 How can you prevent acid rain? Remove sulfur from fuel before burning 15 of 28 What is Carbon Capture and Storage tech? Stop CO2 emissions from fossil fuels- CO2 stored in old oil and gas fields 16 of 28 What are advantages of nuclear power? No greenhouse gases, more energy transferred per kg (30,000 MJ) 17 of 28 What are disadvantages of nuclear power? Radioactive waste stored for centuries, explosion in reactor- release radioactive material 18 of 28 What are advantages of renewable energy sources? Renewable, no pollutants, no radioactive waste, used where connection to national gird is uneconomical 19 of 28 What are disadvantages of renewable energy sources? Can’t meet demand, some are eyesore + noisy, affect habitats, unreliable 20 of 28 Which has the shortest to longest start up time? Oil, nuclear, natural gas, coal (Short) Natural gas, oil, coal, nuclear 21 of 28 Which energy sources provide constant electricity (base load)? Nuclear and coal 22 of 28 Which energy sources meet daily demands and extra demand in winter? Gas and pumped storage scheme 23 of 28 What are pumped storage schemes? Reservoir stores water, flows into loch turning turbines and generator, pumped back up, repeated 24 of 28 Which energy source are used when demand is high? Renewable 25 of 28 What are costs of energy facility? Capital- build, running cost- fuel and maintanance, capital- get rid of 26 of 28 Which energy source is the cheapest and which is the most expensive? Hydroelectrical and off-shore wind farm 27 of 28 How can you reduce the need for energy facilities? Low- energy light bulbs, improve home insulation etc. 28 of 28
Comments
No comments have yet been made