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Alternative Energy5.3
Great website…http://www.eia.doe.gov/kids/energy.cfm?page=solar_home-basics#solar_environment-basics
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Wind Energy• http://
www.eia.doe.gov/kids/energy.cfm?page=wind_home-basics-k.cfm
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Wind energy…how it works
• Wind blows across windmill
• Windmill turns
• Energy goes to generator to make electricity
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Wind energy+ -
• Good– No air or water pollution– Wind blows constantly inn many places
• Problems– Can not be used everywhere (no wind)– Birds can fly into them and get hurt
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Wind energy…used in…
• California• Texas• Iowa • Minnesota• Washington• Germany• Spain• China
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Hydroelectric
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Hydroelectric+ -
• Good– No air pollution– Helps control flooding downstream
• Problems– Fish can not migrate…fish ladders are put in– Floods areas where people were living
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Tidal energy
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Wave energy
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Waves
• West coast of USA
• Japan
• New Zealand
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Geothermal
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Geothermal+ -
• Good– Costs less to operate– No air pollution
• Problems– No “hot spots” in all areas of the world
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Photovoltaics…solar panels
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Photovoltaics+ -
• Good– No pollution– Use space that isn’t used for anything else
• Problems– Not sunny all of the time
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Photovoltaic
• NC
• California
• Germany
• Europe
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Solar Hot Water
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Solar hot water + -
• Good– Costs less to make hot water– No pollution
• Problems
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Solar hot water
• USA
• Europe
• Central America
• …any place where it is sunny!
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Homework
• Read pages 134 - 141
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Output
• Sketch a house and show what alternative energy sources you could use if you have unlimited $$$!