Why Is the Great Salt Lake Salty?
Why Is the Great Salt Lake Salty? You don’t need an air mattress to float on the surface of the Great Salt Lake in Utah. The water is so salty that you cannot...
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Why Is Ice Slippery?
It is hard to walk on ice because its smooth, frozen surface causes you to slip. Ice is slippery not only because it is smooth but also because it melts under the...
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How Do Removable Stickers Stick?
How Do Removable Stickers Stick? Stickers use a substance called an adhesive—a kind of glue or paste that makes them stick to a surface. Adhesives can be made from...
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Why Does an Ice Cube Float?
Why Does an Ice Cube Float? Ice cube floats because it is lighter than water. When water freezes, it increases its volume (expands) by about one-tenth. When 10 quarts...
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Why Does Hair Turn Gray?
People with gray or white hair didn’t always have hair that color. Their hair may once have been black or brown, light blond or flaming red. Your hair grows from...
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