What Is a Butte and How Does It Form?
What Is a Butte and How Does It Form? In geomorphology, a butte is an isolated hill with steep, often vertical sides and a small, relatively flat top; buttes are...
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Why Do Fish Have Scales?
Why Do Fish Have Scales? Most fish are covered with a layer of flat scales, which overlap each other like the shingles on a roof. The hard scales form a protective...
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How Do Mirrors Work?
How Do Mirrors Work? Most mirrors are made of a sheet of polished glass with a thin coat of silver paint on the back. The silver backing reflects the light that falls...
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What Causes Warts?
What Causes Warts? Warts are skin infections caused by tiny germs called viruses of the human papillomavirus (HPV) family that get into your skin. The infected skin...
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What Are the Dark Spots on the Moon?
The dark spots we see on the moon are really the moon’s large flat plains. The moon’s rugged surface is covered with mountains, craters, and great lava...
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