How Do Silkworms Make Their Silk?
How Do Silkworms Make Their Silk? Silkworms are the caterpillars of the silk moth. They use the silk they make for their cocoons. Silkworms are fed leaves of the...
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What Is Glue Made Of?
Glue is a sticky liquid that can stick two or more things together. Glue can be made from plant or animal parts, or it can be made from oil-based chemicals. The first...
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What Is the Liquid in a Thermometer?
What Is the Liquid in a Thermometer? Most thermometers are sealed glass tubes with liquid inside. The liquid is either mercury, which is silvery, or alcohol, which 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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Why Does Boiling Water Bubble?
Why Does Boiling Water Bubble? When you boil water in a teakettle, you heat it to the point where it changes from a liquid to an invisible water gas called...
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