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foam |
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foam: see colloid colloid (kŏl`oid) [Gr.,=gluelike], a mixture in which one substance is divided into minute particles (called colloidal particles) and ..... Click the link for more information. . foam 1. a mass of small bubbles of gas formed on the surface of a liquid, such as the froth produced by agitating a solution of soap or detergent in water 2. frothy saliva sometimes formed in and expelled from the mouth, as in rabies 3. the frothy sweat of a horse or similar animal 4. a. any of a number of light cellular solids made by creating bubbles of gas in the liquid material and solidifying it: used as insulators and in packaging b. (as modifier): foam rubber 5. a colloid consisting of a gas suspended in a liquid 6. a mixture of chemicals sprayed from a fire extinguisher onto a burning substance to create a stable layer of bubbles which smothers the flames foam [fōm] (chemistry) An emulsionlike two-phase system where the dispersed phase is gas or air. (fluid mechanics) A collection of bubbles on the surface of a liquid, often stabilized by organic contaminants, as found at sea or along shore. Also known as froth. (geology) How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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The reduced pressure in the chamber causes the dissolved hydrogen to come out of solution in the melt and either escape from the sample through the molten surface or form bubbles in the solidifying sample. As gas-charged magma makes its way to Earth's surface, where pressures are much lower, the gases--water vapor, carbon dioxide, sulfur dioxide, and others--begin to form bubbles within the material. As the deep water rose, dissolved carbon dioxide came out of solution to form bubbles, just as soda fizzes when one uncaps a bottle. |
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