When Was the Automobile Invented?
When Was the Automobile Invented? The first self propelled “automobile” was built in 1796 by a French army officer named Nicolas Joseph Cugnot. It was a...
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How Does a Coffee Percolator Work?
How Does a Coffee Percolator Work? Many people brew their coffee in coffee pots called percolators. Inside a coffee percolator is a hollow stem. Sitting on top of the...
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When Did Kindergartens Start?
When Did Kindergartens Start? Kindergarten is a classroom program that consists of children ages three to seven years of age. The programs range from half days to full...
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How Do Chameleons Change Color?
How Do Chameleons Change Color? The chameleon is famous for changing color. Some can change from green to brown, or to red or yellow. This little lizard can change...
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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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How Do Birds Fly?
How Do Birds Fly? Most birds are well suited for flying. First of all, a bird has feathers and wings, and powerful muscles in its breast with which to flap them. A...
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How Does a Squid Use Its Ink to Escape Enemies?
How Does a Squid Use Its Ink to Escape Enemies? Squid (and also octopus) belong to a group of animals called “Cephalopods” and these animals all shoot out...
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How Do Glaciers Form?
A glacier is a great river of ice that moves slowly down a mountain. Glaciers form in high mountain valleys, where summers are so cold that most of the winter snow...
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Why Does the Camel Have a Hump?
Why Does the Camel Have a Hump? The camel’s best known feature is the hump on its back. The camel’s hump is mostly fat that provides nourishment when food...
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How Are Sewing Needles Made?
How Are Sewing Needles Made? A sewing needle is a long slender tool with a pointed tip that is used for stitching. A hand sewing needle has a hole on the non pointed...
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