 How does a windmill blades work and create energy?

 You should be able to describe what wind is and how it is formed.  You should be able to understand that high pressure will always move to area of low pressure.  You should be a able to understand the concept of Conservation of energy  You should be able explain the basic function of a windmill  You should be able to explain what lift and how it affects a helicopter, plane, and windmill mechanics.

 Wind  Windmill  Lift  Drag

 How does a helicopter fly in the air?  How does an airplane fly in the air?  How does blowing on a windmill cause it to spin?  How are the helicopter, airplane, and windmill all related?

 Wind is moving air and is caused by differences in air pressure moves toward areas of low pressure. The greater the difference in pressure, the faster the air flows.

Wind energy is created by uneven heating of the earth’s surface.

 Land-sea breezes created by temperature differentials  Winds also stronger near shore because of long unobstructed land  Sea breezes typically strongest in late afternoon

 Describe in your own word how wind is formed?

 Lift is created in a similar way to wind. When air is moved over an object like a blade or a wing it creates lift by moving air faster over one surface than the other.  This faster moving air creates an area of lower pressure and the slower air creates an area of higher pressure  Just like wind air moves from high to low pressure.

 Lift and drag are forces on an object in a fluid like air  The Lift Force is perpendicular to the direction of motion. We want to make this force BIG.  The Drag Force is parallel to the direction of motion. We want to make this force small.

 The turning blades turn a shaft  The Shaft will turn a electromagnetic generator  The electromagnetic generator creates the electricity and power.  The power is stored in a grid and battery and can be used for other purposes!

 Which of the following is true of air?  A) It moves from low pressure to high pressure  B) It moves from High to Low Pressure  C) It moves only when someone pushes it  D) Both A and B.  Answer – B wind always moves from area of high pressure to area of low pressure.

 A) Upwards  B) Downwards  C) Inland  D) or out towards the ocean

 A) By deflecting air downward that will push on the bottom the ground and propel the helicopter up.  B) The spinning of the air blades creates circular motion that sling the helicopter up.  C) The blades of the helicopter deflect the air downwards creates lower pressure on top of the blades and higher pressure on the bottom.  D) Creates lift by moving the air upwards creating high pressure on top of the blades.

 A) The tail creates low pressure on the top part of the plane and the high pressure on the bottom the difference creates lift.  B) The wing creates low pressure on the top part of the plane and the high pressure on the bottom the difference creates lift.  C) The tail creates low pressure on the top part of the plane and the high pressure on the bottom the difference creates lift.  D) The wing creates high pressure on the top part of the plane and low pressure on the bottom the difference creates lift.

 A) It does not create lift  B) It creates lift the same as a helicopter blade and airplane wing.  C) It only creates drag forces  D) It creates lift by causing air to flow in a circular motion.

 Create a concept map of the how a windmill works. Using terms such as wind, blades, lift, pressure, shaft, windmill, generator, and power.