Who Invented Cement?
Who Invented Cement? Concrete is a material used in building construction, consisting of a hard, chemically inert substance, known as an aggregate (usually made from...
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How Does a Clam Make Its Shell?
If you have ever examined a clam shell, you may have wondered how the shell got bigger as the clam grew. A clam is born with a shell just the right size for its body....
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What Is Paint Made From?
What Is Paint Made From? Ordinary house paint gets its color from colored powders called pigments. Pigments can come from ground-up rocks, or coal, or tar, or chalk and...
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How Is Soap Made?
When you wash with soap, you are using a cleaning material made chiefly of animal fats, vegetable oils and an alkali chemical. In the soap factory, the soap materials...
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How Is Coal Formed?
How Is Coal Formed? Coal comes from plants that have been buried in the earth so long, they turned hard and black. Millions of years ago, much of the earth was swampy...
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