Fossil Fuels

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  • Created by: Hope
  • Created on: 26-05-14 16:45
What are fossil fuels?
Coal, oil and natural gas
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How are fossil fuels formed?
From the remains of living organisms, they release energy when they are burned
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What are the disadvantages of fossil fuels?
They are limited, realease sulfur dioxide, release carbondioxide - green house effect
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What is carbon caputure?
A techonology that seperates carbon dioxide from waste gases then stores it underground
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What are the main nuclear fuels?
Uranium and plutonium -which are radioactive metals
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How do nuclear fuels release energy?
Nuclear fission inside the nuclei of the atom
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What are the advantages of nuclear fuels?
Dont produce carbon dioxide or sulfur dioxide
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What are the disadvantages of nuclear fuels?
Non-renewable, hazardous to peoples health
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What is wind produced by?
Convection currents in the earths atmostpehre which are driven by heat energy from the sun
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What are the advantages of wind energy?
Renewable energy, no fuel costs and no harmful polluting gases produced
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What are the disadvantages of wind energy?
Noisy, spoils view, amount of electricity depends on the amount of wind
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How do wave machines work?
The kinetic energy in the movement of the waves drive electricity generators
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How do tidal barrages work?
They are barriers in rivers to make use of kinestic energy in the moving water
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How do hydroelectric power stations work?
The water comes from behind a damn, the high up water has gravitational energy which is transferred into kinetic energy
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What are the advantages of using wave energy?
Renewable energy, no fuel costs, no harmful polluting gases are produced, very reliable
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What are the disadvantages of using wave energy?
Destroy habitats, push people from homes, rotting vegetation underwater releases methane (greenhouse gas)
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What is geothermal energy?
Hot water and steam from deep underground can be used to drive turbines
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How can we use volcanic areas to create energy?
Radioactive decay of rocks that contain radioactive substances releases heat energy which can heat water which creates steam to be used ot drive turbines ect.
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What are solar cells?
Devices that convert light energy directly into electrical energy
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What are the advantages of solar cells?
Renewable, no fuel costs, no harmful polluting gases
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What are the disadvatages of solar cells?
Expensive and inefficent, dont work at night
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What kind of electricity do nuclear and coal-fired power stations provide?
Base load electricity - they run all the time because they take the longest time to start up
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What are oil fired and gas fird power stations used for?
Providing extra electricity at peak times because theyt ake the least time to start up
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Complete this sentence: In a wire the higher the current...
The most heat is lost
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To reduce heat loss, how does the national grid transmit electricity?
At a low current and a high voltage
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What do step up/step down transformers increase/decrease?
Voltage
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Other cards in this set

Card 2

Front

How are fossil fuels formed?

Back

From the remains of living organisms, they release energy when they are burned

Card 3

Front

What are the disadvantages of fossil fuels?

Back

Preview of the front of card 3

Card 4

Front

What is carbon caputure?

Back

Preview of the front of card 4

Card 5

Front

What are the main nuclear fuels?

Back

Preview of the front of card 5
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