How Does a Fire Extinguisher Work?
How Does a Fire Extinguisher Work? Most fire extinguishers smother a fire by shutting off the supply of air with certain chemicals. The carbon dioxide extinguisher...
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How Are Natural Diamonds Formed?
How Are Natural Diamonds Formed? Diamonds are made of pure carbon. Formed naturally in volcanoes, where tremendous heat and pressure act on the carbon found in the...
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How Do Sailboats Sail into the Wind?
How Do Sailboats Sail into the Wind? Sailboats cannot sail directly into the wind. They can, however, sail upwind by following a zigzag course so that the wind pushes...
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What Causes an Earthquake?
What Causes an Earthquake? An earthquake is caused by movements that take place beneath the Earth’s surface. The outer layer (crust) of the Earth consists of huge...
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How Are Mountains Formed?
How Are Mountains Formed? Mountains are created by slow movements in the earth’s crust. In some places, heat and pressure deep inside the earth slowly buckle the...
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