Heating Lime (limelight)

Heating Lime (limelight)

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Credit: Ted Kinsman/SCIENCE PHOTO LIBRARY

Caption: A seashell (having previously been converted to lime in a kiln) is heated to produce limelight. Lime is produced by heating calcium carbonate until the extra carbon and oxygen atoms are driven off, leaving just the calcium oxide, or quicklime, which is used to make limelight (a historic type of stage lighting and source of the phrase 'in the limelight'). Lime can be made from marble, chalk, and many types of rock, even from seashells.

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Keywords: burn, burning, calcium, calcium oxide, cao, chemical, chemical compound, chemistry, compound, flame, glow, glowing, heat, heating, historical, history of limelite, hot, incandescent, incandescent light, lime, lime light, limelight, quicklime, seashell, shell

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