Windmills work by using large blades to catch the wind. When the wind blows, it turns the blades around a rotor, which spins a generator to produce electricity or performs mechanical work like pumping water or grinding grain. Essentially, windmills convert the kinetic energy of the wind into mechanical power or electricity.
MCQs
1. What is the main purpose of modern windmills?
A) To grind grain into flour
B) To pump water
C) To generate electricity
D) To decorate gardens
2. What part of the windmill captures the wind?
A) The base
B) The tower
C) The blades
D) The generator
3. How does the wind’s energy get converted into electricity in a wind turbine?
A) The wind heats the blades
B) The blades spin a shaft connected to a generator
C) The wind directly charges batteries
D) The blades reflect sunlight to a generator
4. What historical use did windmills have before electricity generation became common?
A) Sending messages
B) Grinding grain
C) Driving cars
D) Heating homes
Fill in The Blanks
Choose from These Words: wind, renewable.
1. Windmills work by harnessing the power of the ___________ to generate electricity.
2. Windmills are a clean and ____________ source of energy.
True / False
1. Windmills create electricity by using the energy from the sun (True / False)
2. Windmills work by turning the blades with the help of water (True / False)
3. Windmills can only generate electricity during the day (True / False)
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