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How does a light bulb work – for kids? How does a light bulb work - for kids?Have you ever looked closely at an ordinary electric light bulb? Hold it carefully while you do so. Inside, you ...
How is natural gas produced? – natural gas f... How is natural gas produced?- natural gas for kids The most important gas that we use as a source of energy is natural gas.We don't have to make this....
History of Calendar and What is the Gregorian Cale... History of Calendar and What is the Gregorian Calendar?When people first began to sow wheat and reap the harvest, they had observed that sowing falls ...
Who invented the airplane? Who invented the airplane? The thought of flying like a bird, is among the oldest of human dreams. One of the most famous legends of the ancient Gre...
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