Why Did Men Wear Powdered Wigs in the 1700s?
Why Did Men Wear Powdered Wigs in the 1700s? Although wig wearing dates back to ancient times, the fad of wearing powdered wigs was popular during the 1600’s and...
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Why Doesn’t a Sleeping Bird Fall off Its Perch?
Why Doesn’t a Sleeping Bird Fall off Its Perch? A sleeping bird cannot fall off a twig or branch because its feet are firmly locked in place. The feet of passerines...
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What Causes Lightning?
What Causes Lightning? Lightning is an electric current. During a thunderstorm, water droplets in the clouds become charged with electricity as they are bounced about...
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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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How Far Away Is the Horizon?
The distance to the horizon, the imaginary line where the sky seems to meet the earth, depends on how high our eyes are above the level of the land we are looking...
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What Does the Pelican Use Its Pouch For?
The pelican uses its pouch as a dip net to scoop up fish from the water. A pelican’s pouch hangs from the underside of its long beak. When the bird spots a fish...
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Can Sound Trigger an Avalanche?
Can Sound Trigger an Avalanche? Under certain conditions experts claim that a sudden, sharp sound can break loose a mass of snow high on a mountain peak. From there it...
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What Is an Oasis?
Many deserts are almost totally without water. Few plants can live in the dry, moving sands of these deserts. An oasis in the desert is a place where a natural spring,...
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What Does a Scorpion Use Its Sting For?
What Does a Scorpion Use Its Sting For? A scorpion is part of the arachnid family, which also includes mites, ticks, and spiders. Scorpions are about 3 inches long,...
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Why Do Fish Swim in Schools?
Why Do Fish Swim in Schools? Fish form schools for protection from predators, schools containing hundreds or thousands of nearly identical fish can confuse predators...
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