How Does Radar Work?
How Does Radar Work? Radar is a system for determining an object’s location, and how far away it is, even though you can’t see it. To detect airplanes and...
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Why Do I Get a Shock When I Walk Across a Carpet and Touch a Metal Doorknob?
Why Do I Get a Shock When I Walk Across a Carpet and Touch a Metal Doorknob? The tiny electric spark you get when you touch something made of metal, after you’ve...
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How does a Broken Bone Heal itself?
How does a Broken Bone Heal itself? Bones are flexible enough to give a bit when physical force is applied, but if that force is too great, they’ll snap like a plastic...
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Where Did the Saying “Mind Your P’s and Q’s” Come From?
Where Did the Saying “Mind Your P’s and Q’s” Come From? When someone says, “Mind your P’s and Q’s,” it usually means “be careful of what...
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Why Do Cats Have Rough Tongues?
Why Do Cats Have Rough Tongues? A cat’s rough tongue enables it to file bits of meat from bones, and to lap up its food. It also helps the cat clean itself. After...
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Why Can’t We See the Stars in Daytime?
Why Can’t We See the Stars in Daytime? The stars shine all the time, day and night. We do not see them in daytime because of the glare of sunlight. The sun’s...
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Why Are Moths Attracted to Lights at Night?
Why Are Moths Attracted to Lights at Night? Moths are not really attracted by the light itself. When a moth flies at night, it uses the moon as a beacon to guide it. By...
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How Do Bees Make Honey?
How Do Bees Make Honey? When a honeybee visits a flower, it sucks up droplets of sweet nectar with its long hollow tongue called proboscis. The nectar goes into a...
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How Are Chalk Crayons Made?
How Are Chalk Crayons Made? When you write with chalkboard chalk, you are writing with soft white limestone rock. But the limestone rock is first crushed to powder...
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How Does a Refrigerator Work?
How Does a Refrigerator Work? Earlier food was preserved by traditional methods like salting and pickling which were not always practical. Nowadays refrigerators are...
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