where does energy come from? where energy comes from how magnets produce electricity
TRANSCRIPT
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CLEAN ENERGY
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Where does energy come from?
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Where does energy come from?
Where Energy Comes Fromhttp://www.youtube.com/watch?v=__zB80Saglk
How Magnets Produce Electricityhttp://www.youtube.com/watch?v=FehUCQKKRwo
Energy 101: Electricity Generationhttp://www.youtube.com/watch?v=20Vb6hlLQSg
What can you create by knowing this information?http://www.youtube.com/watch?v=XlqYbJps_JY
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Steam Turbines
How a Steam Turbine Generator Works
http://www.youtube.com/watch?v=eNCyTfUvZws
Steam Turbine: How does it work? http://
www.youtube.com/watch?v=5kFOq9_10kc
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Main Current Energy Source
Fossil FuelsInclude coal, petroleum, and natural
gasBurned to produce energy (heat) to
turn turbines
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Pros of Fossil Fuels Well Developed Technology Cheap and Reliable
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Cons of Fossil Fuels
Produces Greenhouse gases Non-renewable (in the short term) Unsustainable Fuel Accidents
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Changing Our Energy Sources
Wind PowerWind causes the blades of wind
turbines to turn, powering generators that produce electricity.
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Pros of Wind Power Renewable energy Creates no waste In Spain, Portugal, Denmark and
Germany, almost one-fifth of the energy total is wind power
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Cons of Wind Power
Wind is unpredictable, and may not be relied upon all the time
Some people dislike the appearance of wind turbines
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Changing Our Energy Sources
Solar PowerSolar panels absorb solar energy and
convert it to electricity
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Pros of Solar Power Renewable energy Can get energy in remote locations Once in place, does not cost much
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Cons of Solar Power
No energy is produced during the night
The initial cost is expensive Weather can affect the amount of
energy absorbed
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Changing Our Energy Sources
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Changing Our Energy Sources
HydroelectricityThe energy of moving water turns
turbines to power generators
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Pros of Hydroelectricity Generates a lot of power Waterfalls exist whether we use
them or not (renewable)
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Cons of Hydroelectricity
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Cons of Hydroelectricity Expensive to build Potentially impact ecosystems Can be affected by droughts
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Changing Our Energy Sources
Nuclear PowerEnergy is created by splitting the
nuclei of atoms
A nuclear core, at the McMaster University Nuclear Reactor in Hamilton, Ontario
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Pros of Nuclear Power Clean-burning energy, almost no
carbon emission Produces a lot of energy through
nuclear fission ()
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Cons of Nuclear Power Homer Simpson works at a nuclear
plant
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Cons of Nuclear Power The left over atomic pieces
produce nuclear waste
Nuclear waste gives off radiation
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Cons of Nuclear Power
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Cons of Nuclear Power
The Chernobyl Nuclear Disaster
Chernobyl Ukraine1986
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Cons of Nuclear Power
The Chernobyl Nuclear Disaster
Chernobyl Ukraine1986
Thyroid cancer incidence in children and adolescents from Belarus after the Chernobyl accidentYellow: Adults (19–34)Blue: Adolescents (15–18)Red: Children (0–14)
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Cons of Nuclear Power
The Fukushima Nuclear DisasterFukushima Japan
2011
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Cons of Nuclear Power
Thyroid cancer incidence in children and adolescents from Japan after the Fukushima accidentYellow: Adults (19–34)Blue: Adolescents (15–18)Red: Children (0–14)
The Fukushima Nuclear DisasterFukushima Japan
2011?
Japan
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Changing Our Energy Sources
BiomassBiomass from waste such as crops,
manure and garbage can be used to make biofuels like methane, gas, and biodiesel
The fuels can be burned for heat or to generate electricity with a steam turbine
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Changing Our Energy Sources
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Pros of Biomass Energy Renewable – we are always
producing garbage, manure, and crops
Carbon Neutral - part of the carbon cycle – carbon is absorbed during photosynthesis and then released when it is burned
Not as expensive as coal and oil
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Cons of Biomass Energy Expensive Requires Large Areas