What Makes a Knot in a Piece of Wood?
What Makes a Knot in a Piece of Wood? A knot in a piece of wood is simply a lump, or growth, formed at the point where a branch grew out of the tree trunk. When the...
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How Are Oysters Born?
How Are Oysters Born? Baby oysters are hatched from tiny eggs. A female oyster can lay as many as 70 million eggs a year. For a few days after oysters hatch from their...
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How Does Tape Recorder Work?
How Does Tape Recorder Work? The tape for a tape recorder is coated with tiny bits of iron. When you speak into a tape recorder microphone, the sound pattern of your...
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What Is Sea Level?
We say that Mount McKinley in Alaska is 20,320 feet above sea level, or that Death Valley, in California, is 282 feet below sea level. And we say that the surface of...
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What Causes the Ring Around Moon?
What Causes the Ring Around Moon? We can sometimes see a big ring of light around the moon. A ring around the moon is caused when the moon shines on thin clouds made of...
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Where Did Ice Cream Originate?
Where Did Ice Cream Originate? Many nations claim to have invented it, just as various individuals take credit for it. The big scoop on ice cream began with the Roman...
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Can a Lizard Break off Its Tail?
Can a Lizard Break off Its Tail? Have you ever seen an animal drop off its tail? Grass snakes and certain other lizards can leave their tails behind to save their...
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What Makes Hail?
During a thunderstorm, balls of ice, called hail, may fall. Hail starts as rain. Before the drops can fall, strong air currents carry them to the upper part of the...
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When Was the Pencil Invented?
When Was the Pencil Invented? Did you know that modern pencils owe it all to an ancient Roman writing instrument called a stylus? Scribes used this thin metal rod to...
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Why Do I Have a Fever When I’m Sick?
Why Do I Have a Fever When I’m Sick? If your body temperature is higher than 98.6 degrees Fahrenheit when you are sick, you probably have a fever. A fever is almost...
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