Why Does a Whale Spout?
Why Does a Whale Spout? Whales spout “fountains” of steam, which are formed by their breath. Whales breathe through blowholes on the top of their heads....
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What Makes a Match Light?
What Makes a Match Light? The tips of ordinary wooden matches are coated with special chemicals that burst into flame at a relatively low temperature. When the tip is...
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What Gives Opals Their Colors?
What Gives Opals Their Colors? The beautiful flashes of color given off by a precious opal as it is turned and viewed from different angles are caused by the various...
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What Is Paint?
Paint is a mixture of a liquid vehicle, such as oil or a resin, and one or more colored powders. The colored powders, called “pigments,” give the paint its...
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What Makes the Wind Blow?
What Makes the Wind Blow? Wind is air in motion. Wind is caused mainly by the uneven heating of the air around the earth by the sun. Since the earth’s surface is made...
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