20120911



=Grades, ERa, and ER1= ERa is a benchmark; keep at it until you get it right. ER1 is an exercise; keep at it, and you can learn from your mistakes; PrGr is a .... well, it can be hard to explain! =US Energy Statistics= We'll look at energy in two different ways. Sometimes, it looks like they don't fit together, but they do! =Generating Electricity: Wind= We'll try making windmills at your desk... =Generating Electricity: Solar= We'll compare the windmills to a solar panel...

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