Deconstructed - Part one

1/        Watch the first part of the video twice (“Deconstructed - part one.wmv”). Fill in the blanks while and after listening. (one blank = one word)

Wind turbine blades are _____________ designed to catch the maximum ________ of _______ ________ to make them rotate. Inside the turbine, an ____________ _______ transforms that _________ ___________ into electricity that is _______ in a ________. The stronger the wind, the faster the blades rotate, the more power generated. Getting the blades moving is the first step and to do that, of course, requires a _______ _______ _______.

The ________ ______ blades are aerodynamic to fully exploit ______ ______. One surface is rounded, the other relatively flat. Wind flowing over the ________ ____ speeds up and creates a ____ __________ pocket that sucks the blades sideways, what's known as ____. Now that lift sets  the blades in ________, let's see how this rotation can be turned into wattage to power the fridge or stove.

2/        Why are blades made in carbon fiber?

3/        Give an example of another system which uses lift process.

4/        Compare the wind turbine from video n°1 (Introduction) and the one from video n°2 (Deconstructed).

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