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13 Cards in this Set
- Front
- Back
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Anaerobic bacteria |
a kind of bacteria which thrive in the absence of air & converts dead plants into coal by removing hydrogen & oxygen. |
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Carbonisation |
the slow conversion of wood into coal by biochemical processes, extending over millions of year under high temperature & pressure. |
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Destructive distillation |
heating of complex organic substance in the absence of air so that it breaks up into simpler volatile fractions. |
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Exhaustible natural resources |
the natural resources which are likely to be exhausted in the near future by various man activities. |
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Fossil fuels |
the fuels formed from the fossils of dead organisms . |
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Inexhaustible natural resources |
the natural resources which are not likely to be exhausted by various human activities & are limitless. |
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Natural gas |
a combustible gas which comes out along with petroleum from the oil wells. |
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Petroleum |
a dark coloured , viscous & foul smelling liquid which is a mixture of solid , liquid & gaseous hydrocarbons ,mixed with salt water & earthly particles. |
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Petroleum refinery |
a factory in which the various constituents of petroleum are separated to form useful products. |
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volatile compounds |
easily evaporated at normal temperature. |
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Sooty flame |
unsaturated carbon compounds do not burn completely & give a yellow colour flame with partially burnt carbon particles & is polluting. |
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Ore |
a naturally occurring substance from which an important material ( metal) can be extracted. |
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Calorific value |
the energy released by a unit weight of substance on complete combustion. |
