Generating Electricity

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  • Created by: Maddi
  • Created on: 21-04-14 19:04
How is electricity generated in a power station?
Electricity generators in power stations are driven by turbines.
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Which fossil fuels do we burn in power stations?
Coal, oil and natural gas are burned in fossil fuel power stations.
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How do we use nuclear fuels in power stations?
Uranium or plutonium are used as the fuel in a nuclear power station. Much more energy is released per kg from uranium or plutonium than from fossil fuel.
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What other fuels can be used to generate electricity?
Biofuels are renewable sources of energy. Biofuels such as methane and ethanol can be used to generate electricity.
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What does a wind turbine consist of?
A wind turbine is an electricity generator on top of a tall tower.
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How do we use waves to generate electricity?
Waves generate electricity by turning a floating generator.
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What type of power station uses water running downhill to generate electricity?
Hydroelectricity generators are turned by water running downhill.
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How can we use the tides to generate electricity?
A tidal power station traps each high tide and uses it to turn generators.
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What are solar cells and how do we use them?
Solar cells are flat solid cells that convert solar energy directly into electricity.
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What is the difference between a panel of solar cells and a solar heating panel?
A solar cell panel converts sunlight to electricity whereas solar heating panels use sunlight to heat water.
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What is geothermal energy?
Geothermal energy comes from the energy released by radioactive substances deep inside the Earth.
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How can we use geothermal energy to generate electricity?
Water pumped into hot rocks underground produces steam to drive turbines that generate electricity.
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Why are there only a few places in the world able to have geothermal power stations?
In many places in the world the hot rocks are too far below the surface to be used.
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What do fossil fuels do to our environment?
Fossil fuels produce increased levels of greenhouse gases which could cause global warming.
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Why are people concerned about nuclear power?
Nuclear fuels produce radioactive waste.
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How do renewable energy resources affect our environment?
Renewable energy resources can affect plant and animal life.
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What is the National Grid?
The National Grid is a network of cables and transformers that distributes electricity to our homes from distant power stations and renewable energy generators.
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What do the transformers do in the National Grid?
Step-up transformers are used to step up power station voltages to the grid voltage. Step-down transformers are used to step
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Give two advantages of overhead cables compared to underground cables.
Overhead cables are easier to repair and are cheaper.
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Why does the demand for electricity vary between summer and winter?
The demand increases in winter because it is colder so more electricity is used to heat homes.
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Which energy resources need to be developed to meet our energy needs in the future?
Nuclear power stations, fossil-fuel power stations using carbon capture and renewable energy are all likely to contribute to future energy supplies.
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Other cards in this set

Card 2

Front

Which fossil fuels do we burn in power stations?

Back

Coal, oil and natural gas are burned in fossil fuel power stations.

Card 3

Front

How do we use nuclear fuels in power stations?

Back

Preview of the front of card 3

Card 4

Front

What other fuels can be used to generate electricity?

Back

Preview of the front of card 4

Card 5

Front

What does a wind turbine consist of?

Back

Preview of the front of card 5
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