Why Does a Dog Wag Its Tail?
Why Does a Dog Wag Its Tail? The original purpose of the dog’s tail was for balance. It prevents him from toppling over as he makes sharp turns while running or...
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What Causes Thunder?
What Causes Thunder? Thunder is caused by lightning. During a thunderstorm, electrical charges build up in the clouds. When a charge becomes strong enough, there is a...
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Why Older People Lose Their Memory?
Why Older People Lose Their Memory? The stereotype of the old forgetful person whose memory often fails him is widely held, but the reason for its appearance was never...
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What Makes Waves in the Ocean?
What Makes Waves in the Ocean? Most waves in the ocean are caused by the wind. Somewhere, far out at sea, wind ruffles the surface of the water. Ripples form and grow...
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What Are Geodes and How Do They Form?
What Are Geodes and How Do They Form? Geodes are spherical rocks that contain hollow cavities lined with crystals. The name geode comes from the Greek word Geoides,...
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How Do Scallops Swim?
How Do Scallops Swim? One could say that scallops jet-propel themselves through the water. Like oysters and clams, the shells of scallops have two tightly fitting...
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How Do Fish Live in a Frozen Pond?
How Do Fish Live in a Frozen Pond? Anyone who has fished through a hole in the ice knows that many fish are active in the winter. Usually, what we call a frozen pond is...
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How Is Mexican Salsa Made?
How Is Mexican Salsa Made? Most Mexican salsas were originally made using a traditional mortar and pestle. Today, modern food processors and blenders are usually used...
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Why Does Boiling Water Bubble?
Why Does Boiling Water Bubble? When you boil water in a teakettle, you heat it to the point where it changes from a liquid to an invisible water gas called...
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What Is the Milky Way?
On a clear night you can see a pale white path of light that stretches across the sky. It is what we call the Milky Way. It is the light from the billions of stars that...
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