What Is Administration of Vaccine Called?
What Is Administration of Vaccine Called? Vaccine is a substance which is introduced into the body in order to help it build up a resistance or immunity to a particular...
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What Is It about Bleach That Makes Colors Less Colorful?
What Is It about Bleach That Makes Colors Less Colorful? Bleach is used industrially and domestically to whiten clothes, lighten hair color and remove stains. Bleach...
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Where Would You Find Pearls?
Where Would You Find Pearls? Pearls come from mollusks – a group of marine animals which includes squids, clams, and oysters. These beautiful round jewels are the...
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Why Is Gold Precious?
Why Is Gold Precious? Gold has been valued throughout the ages chiefly because it is scarce. It began when Stone Age man noticed shiny specks in river gravel. The heavy...
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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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