What Is Plastic?
What Is Plastic? A plastic, in the modern sense of the word, is a synthetic or man-made material which can be formed into various shapes. The first plastic material was...
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What Is a Detergent?
What Is a Detergent? A detergent is a substance which has a power to cleanse. This description applies to soap, as well as to shampoos and washing powders. A detergent...
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Who Was the Last Man to Discover a Planet?
Who Was the Last Man to Discover a Planet? Clyde Tombaugh, a young American research student, made the last discovery of a planet while working in 1930 at the Lowell...
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When Does a Car Use Overdrive?
When Does a Car Use Overdrive? A car uses overdrive when it is traveling at high speed over long distances. Overdrive, or cruising gear, is a device which enables the...
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Why Does an Astronaut Need a Spacesuit?
Why Does an Astronaut Need a Spacesuit? A spacesuit enables an astronaut to survive by providing him artificially with conditions like those he is used to on Earth....
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When Does Litmus Paper Turn Red?
When Does Litmus Paper Turn Red? Litmus paper turns red when placed in an acid solution, but blue if the solution is alkaline. This absorbent paper is the oldest and...
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Where Does the Wax Go When Candles Burn?
Where Does the Wax Go When Candles Burn? Nowhere-it simply changes into other substances. That is what burning does to everything. The moment you put a match to the...
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Why Do Some Liquids Burn?
Why Do Some Liquids Burn? Some liquids will burn because when their molecules mix with the oxygen in the air the mixture becomes combustible. The application of heat...
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How Is a Sheet of Paper Made?
How Is a Sheet of Paper Made? A sheet of paper consists of vegetable fibres of different sizes, twisted and intertwined with each other and finally squeezed together to...
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What Is Glass Fiber?
What Is Glass Fiber? Glass fiber is a mass of very fine strands of glass. When ordinary glass is spun into thin threads it is strong and bendable, unlike normal glass...
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