Some web sites that can help you to complete your Powerpoint Slideshow about Hydroelectricity and the energy transformation steps.
http://www.daviddarling.info/encyclopedia/H/AE_hydroelectric_power.html
http://www.green-trust.org/hydro.htm
http://en.wikipedia.org/wiki/Itaipu
http://www.solar.coppe.ufrj.br/itaipu.html
http://en.wikipedia.org/wiki/Water_turbine
http://www.daviddarling.info/encyclopedia/P/AE_Pelton_turbine.html
http://en.wikipedia.org/wiki/Pelton_wheel
http://www.green-trust.org/hydro.htm
http://en.wikipedia.org/wiki/Itaipu
http://www.solar.coppe.ufrj.br/itaipu.html
http://en.wikipedia.org/wiki/Water_turbine
http://www.daviddarling.info/encyclopedia/P/AE_Pelton_turbine.html
http://en.wikipedia.org/wiki/Pelton_wheel
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