The purpose of this study is to forecast the scale and distribution character of gas hydrate stability zone in the Chukchi Sea under simulated natural conditions and basing on these results to estimate resource potential of gas hydrates within this area. Three types of stability zone have been identified. A forecast map of gas hydrate environment and potentially gas hydrate-bearing water areas in the Chukchi Sea has been plotted to a scale of 1:5 000 000. Mapping of gas hydrate stability zone allowed to give a justified forecast based on currently available data on geologic, fluid dynamic, cryogenic, geothermal and pressure-temperature conditions of gas hydrate formation in the Chukchi Sea. It is the first forecast of such kind that focuses on formation conditions for hydrates of various types and compositions in the Arctic seas offshore Russia. Potential amount of gas, stored beneath the Chukchi Sea in the form of hydrates, is estimated based on mapping of their stability zone and falls into the interval of 7·10 11 -11.8·10 13 m 3 .
The line between theoretical and practical disciplines such as speech culture and rhetoric is uncertain and moving. The difference of object and divergence of traditions of rhetoric, orthology and the theory of communicative qualities of speech aggravates the problem of textbook creation. Speech culture as an educational subject is currently aimed not at producing a text by the learner, but at memorizing exemplary units, their lists and models of exemplary speech use, which significantly reduces the effectiveness of the discipline.
