Physics chapter 3

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

Card 2

Front

What are disadvantages of wind energy?

Back

Eyesore, noisy, unreliable

Card 3

Front

How does a wave generator produce energy?

Back

Preview of the front of card 3

Card 4

Front

What are disadvantages of wave power?

Back

Preview of the front of card 4

Card 5

Front

Disadvantage of hydroelectric power?

Back

Preview of the front of card 5
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