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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What Are Shooting Stars?
If you look up at the sky on a clear night, you may see a “shooting star” flash across the sky, but they are not stars. Shooting stars are bits of space...
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What Makes a Match Light?
What Makes a Match Light? The tips of ordinary wooden matches are coated with special chemicals that burst into flame at a relatively low temperature. When the tip is...
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Why Do My Ice Skates Slide over the Ice so Easily?
Why Do My Ice Skates Slide over the Ice so Easily? When you ice-skate, you are not skating on the ice itself, but on a slippery film of water between the ice and the...
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What Is Quicksand?
Quicksand is a deep mass of sand so mixed with water that it will not support any weight. It forms when ground water pushes up and mixes into the sand above, making it...
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