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27 Cards in this Set
- Front
- Back
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What is a biofuel? |
A fuel taken from living or recently living organisms. |
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Name two examples of biofuel: |
-animal waste -ethanol |
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Biofuel is a renewable energy source because it’s source either regrows or is continually produced. (True/false) |
True |
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Why is biofuel in theory carbon neutral? |
Because the carbon that the living organism takes in from the atmosphere balances the amount that is released when the biofuel is burnt. |
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What is used as fuel in a nuclear power station? |
Uranium or plutonium |
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What are two advantages of using a nuclear power station than a fossil fuel powered station? |
-they don’t release any greenhouse gases -much more energy is released per Kg from uranium or plutonium than fossil fuels. |
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What is a major disadvantage of using a nuclear power station? |
-it produces radioactive waste that needs to be stored for many years |
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Explain briefly how a wind turbine produces electricity: |
-each turbine has a generator in it. -the force of the wind drives the turbine’s blades around- causing the generator to turn which produces electricity. |
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Whats another renewable source of energy that produces electricity? |
Solar panels- that generate electric currents directly from the sun. |
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Name two advantages of solar power: |
-no cost to run -no pollution |
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Name two disadvantages of solar power: |
-very expensive to install and buy -not 100% reliable as if there is little sunlight little useful energy is produced. (Also you can’t rely on them in the night) |
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What is geothermal energy and where does it come from? |
-it is energy released by radioactive substances in the earth e.g. volcanic eruptions |
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How does geothermal energy work? |
-the energy transferred from the radioactive substances heats the surrounding rock |
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Name two advantages of geothermal energy: |
-reliable free energy -does little damage to the environment |
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What are two drawbacks with geothermal energy? |
-there aren’t many suitable locations for power plants -the cost of building a power plant is very high compared to the amount of energy it produces |
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Explain briefly how waves generate electricity: |
-they generate electricity by turning floating generators in wave turbines that are located around the coast. |
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Name an advantage of wave power: |
-there is no pollution |
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What are two disadvantages of using wave power? |
-wave turbines can disturb seabeds and its habitats -they are fairly unreliable as waves can die down |
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Explain briefly how hydro-electricity works: |
-rainwater is collected in a reservoir and it flows downhill. -the flowing water drives turbines that turn electricity generators. |
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What is a disadvantage of hydro electric power? |
-has a big impact on the environment due to the flooding of an area. |
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What is an advantage of hydro-electricity? |
-no fuel cost and minimal running costs |
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What is a disadvantage of hydro electric power? |
-has a big impact on the environment due to the flooding of an area. |
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What is an advantage of hydro-electricity? |
-no fuel cost and minimal running costs |
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Explain briefly how tidal power works: |
A tidal power station traps each high tide and uses it to turn generators. |
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What is a disadvantage of hydro electric power? |
-has a big impact on the environment due to the flooding of an area. |
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Explain briefly how tidal power works: |
A tidal power station traps each high tide and uses it to turn generators. |
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What are two disadvantages of tidal power? |
-to build a tidal power station big dams are built (also known as barrages) which can alter the habitat of wildlife. -prevents free access by boats |
