Where does energy come from? Where Energy Comes From How Magnets Produce Electricity .
Ks 4 Where Energy
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Transcript of Ks 4 Where Energy
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ENERGYWhere does our Energy
come from?
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Where does our energycome from for?
Electric light
Mobile phones
Power for your mp3
TV Hot Water
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Energy for these things come fromEnergy Resources, that are converted
into energy that we can easily use.
Electricity is the main form of energy
that we use and can power or charge
what we need energy for.
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Energy in Northern IrelandThere are 3 power stations:
1. Coolkeeragh Power Station, near
Londonderry. Uses gas to generateelectricity
2. Ballylumford Power Station, IslandMagee. Uses gas to generate electricity
3. Kilroot Power Station, Carrickfergus.Uses coal to generate electricity
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To generate electricity1. You need an energy source, e.g. coal
2. This is burnt to produce heat or steam3. The heat or steam then drives a turbine
4. The turbine then can drive a generator
5. The generator then produces electricity6. The electricity is then transported incables to where it is needed
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Energy Resources can bedivided into 2 categories:
1. Non-Renewable Resources
For example coal, oil, gas, uranium or ligniteOnce used these resources CANNOT be used again
2. Renewable ResourcesFor example wind, water or solarThese resources can be used over and over again
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Non-Renewable Resources:
COALWhat is it? Formed underground from decaying plant materialHow much left in the world?
About 200 yearsAdvantages? Plenty left Mining is getting more efficientDisadvantages?
Pollution: CO2 emissions (linked to global warming), SO2(linked to acid rain)
Heavy & bulky to transport
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Non-Renewable Resources:
OILWhat is it? Formed underground from decaying animal and plantmaterial
How much left in the world?
About 40 years!Advantages?
Quite easy to transport
Efficient in producing energy
Less pollution than coal
Disadvantages? Not much left
Pollution: air and danger of water pollution through spills
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Non-Renewable Resources:
NATURAL GASWhat is it? Formed underground from decaying animal and plant
materialHow much left in the world?
About 60 yearsAdvantages? Clean, least polluting of all non-renewables Easy to transport
Disadvantages? Some air pollution Danger of explosions
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Non-Renewable Resources:
NUCLEARWhat is it? Uses uranium, naturally found in some rocksHow much left in the world? Not knownAdvantages?
Not much waste and few CO2 emissions released, as wellas, few other greenhouse gases
Disadvantages?
High cost to build and close down power stations. Waste is radioactive. Problem with getting rid of waste
safely
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Non-Renewable Resources:
LIGNITEWhat is it? Formed underground from decaying plant materialHow much left in the world? In Northern Ireland, it is thought at least 30 years
(SOURCE: www.geographyinaction.co.uk/Issues/Lignite)
Advantages? For Northern Ireland: a local resource, good for
generating electricityDisadvantages?
Air pollution, scarring of landscape through open-castmining
High moisture content
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Why is the term, FOSSIL FUELused for coal, oil, gas and
lignite?
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Renewable Resources:WINDWhat is it? It the movement of air from
high to low pressure
How much left? Endless
Advantages? No pollution
Disadvantages? Winds change all the
time, not predictable
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Renewable Resources:SOLARWhat is it? Energy from the sun
How much left? EndlessAdvantages? No pollution, can be usedin remote areas
Disadvantages? Can be expensive,
needs sunlightAt night it doesnt work
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Renewable Resources:BIO-ENERGYWhat is it? Biomass and Biogas
fermented animal or plant waste
vegetation from sustainable sources
How much left? Endless
Advantages? Good availability
Disadvantages? Can be expensive to set up
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Renewable Resources:
HYDROWhat is it? Movement of water drives a
turbine
How much left? EndlessAdvantages? No CO2emissions, can control
flooding and provide a good water supply toan area
Disadvantages? Large areas maybe flooded.Visual and water pollution
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Renewable Resources:GEOTHERMAL
What is it? Heat from the ground often
used to heat waterHow much left? A lot
Advantages? No CO2emissions
Disadvantages? Expensive and can only beused in certain parts of the world
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Renewable Resources:WATER & TIDAL
What is it? Movement of sea drives turbines
How much left? EndlessAdvantages? Can produce a lot of electricity,
no CO2emissions
Disadvantages? Not many suitable sites
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Renewable Energy is increasingin Northern Ireland
TARGET: In Northern Ireland, 12% ofelectricity generated by renewables by2012
NOW: Wind energy supplies frombetween 3-7% of our energy needs
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Where does our Energy comefrom?
From renewable and non-renewable
energy sources Renewable energy sources are now
increasingly being used
Renewable energy: The future ofenergy, today!