How Do Waterfalls Freeze?
Water becomes ice when its molecules move slowly enough to create stiff connections. Normally, the molecules in the waterfall move in response to both flow and thermal...
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What Is Absolute Zero?
Absolute Zero is the lowest possible temperature that there can be. All substances are made up of atoms and molecules, and at high temperatures these move very fast. As...
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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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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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