| křemík |
silicon (A brittle metalloid element that exists in two allotropic forms; occurs principally in sand, quartz, granite, feldspar, and clay. It is usually a grey crystalline solid but is also found as a brown amorphous powder. It is used in transistors, rectifiers, solar cells, and alloys. Its compounds are widely used in glass manufacture, the building industry, and in the form of silicones) |
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| křižovatka |
crossing place (A place, often shown by markings, lights, or poles, where a street, railway, etc. may be crossed) |
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| křoviska hustá v oblasti Středozemního moře |
maquis (A low evergreen shrub formation, usually found on siliceous soils in the Mediterranean lands where winter rainfall and summer drought are the characteristic climate features. It consists of a profusion of aromatic species, such as lavender, myrtle, oleander and rosemary and often includes abundant spiny shrubs. It has been suggested that the maquis is a secondary vegetation, occupying the lands cleared of their natural evergreen oak forests by human activity) |
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| křoví |
brushwood (Woody vegetation including shrubs and scrub trees of non-commercial height and form, often seen in the initial stages of succession following a disturbance. Brush often grows in very dense thickets that are impenetrable to wild animals and serve to suppress the growth of more desirable crop trees. However, brush can also serve an important function as desirable habitat for a range or bird, animal, and invertebrate species, and often provides a good source of browse and cover for larger wildlife. It adds structural diversity within the forest and is important in riparian zones. It is also termed scrub) |
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| křída |
chalk (A soft, pure, earthy, fine-textured, usually white to light gray or buff limestone of marine origin, consisting almost wholly (90-99%) of calcite, formed mainly by shallow-water accumulation of calcareous tests of floating microorganisms (chiefly foraminifers) and of comminuted remains of calcareous algae (such as cocoliths and rhabdoliths), set in a structureless matrix of very finely crystalline calcite. The rock is porous, somewhat friable, and only slightly coherent. It may include the remains of bottom-dwelling forms (e.g. ammonites, echinoderms, and pelecypods), and nodules of chert and pyrite. The best known and most widespread chalks are of Cretaceous age, such as those exposed in cliffs on both sides of the English Channel) |
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| křížení |
hybridization (The act or process of producing hybrids that is an animal or plant resulting from a cross between genetically unlike individuals. Hybrids between different species are usually sterile) |
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| kaňon |
canyon (A long deep, relatively narrow steep-sided valley confined between lofty and precipitous walls in a plateau or mountainous area, often with a stream at the bottom; similar to, but largest than, a gorge. It is characteristic of an arid or semiarid area (such as western U.S) where stream downcutting greatly exceeds weathering) |
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| kaštan |
chestnut (Any north temperate fagaceous tree of the genus Castanea, such as Castanea sativa, which produce flowers in long catkins and nuts in a prickly bur) |
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| kabel |
cable (Strands of insulated electrical conductors laid together, usually around a central core, and wrapped in a heavy insulation) |
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| kadmium |
cadmium (One of the toxic heavy metal which has caused deaths and permanent illnesses in a series of major pollution incidents around the world. Cadmium has no useful biological purpose. However, it has wide industrial applications. It has been used for decades in metal plating to prevent corrosion, in rechargeable batteries and as a pigment in certain plastics and paints. Special care is taken in the industrial smelting of ores and subsequent handling of cadmium, because occupational exposure is known to have caused heart, chest and kidney disorders. Environmental health problems have come from exposure to various sources of pollution, Cd) |
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| kakariki norfolcký |
Norfolk Island parakeet |
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| kal |
sludge (1. A soft, soupy, or muddy bottom deposit, such as found on tideland or in a stream bed. 2. A semifluid, slushy, murky mass of sediment resulting from treatment of water, sewage, or industrial and mining wastes, and often appearing as local bottom deposits in polluted bodies of water) |
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| kal čistírenský |
waste water sludge (The removed materials resulting from physical, biological and chemical treatment of waste water) |
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| kal čistírenský |
sewage sludge (A semi-liquid waste with a solid concentration in excess of 2500 parts per million, obtained from the purification of municipal sewage) |
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| kal aktivovaný |
activated sludge (Sludge that has been aerated and subjected to bacterial action; used to speed breakdown of organism matter in raw sewage during secondary waste treatment) |
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| kal odpadní zbytkový |
residual waste sludge (The excess, unusable semi-solids or sediment resulting from a wastewater treatment or industrial process) |
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| kal odvodněný |
dehydrated sludge (Sludge whose water content has been reduced by physical means) |
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| kal průmyslový |
industrial sludge (Sludge produced as a result of industrial production processes or manufacturing) |
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| kal vyhnilý |
digested sludge (Sludge or thickened mixture of sewage solids with water that has been decomposed by anaerobic bacteria) |
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| kal z čištění |
clearing sludge |
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