Английский язык. Дьякова Н.П. - 9 стр.

                                        Вариант 3

Задание 1. Прочитайте и переведите текст.

                         THE COMPOSITION OF SEA WATER

      Sea water is a "water" only in the sense that water is dominant substance present.
Actually it is a solution of many salts and gases, not to mention a tremendous number
of living organisms, most of which are very minute. Throughout the ages there has
been the steady movement of enormous quantities of materials both in solution and
suspension from the land into the ocean. According to the estimation made by scien-
tists 451, 702 km2 of sea water evaporate and return to the ocean in the from of rain or
water from the rivers every year. The latter amounts to about 132, 297 cubic kilometres
of water annually, which brings 2, 735, 000, 000 metric tons of dissolved salts to the
ocean. In addition vast quantities of suspended mud and silt are carried into the ocean
and deposited near the mouths of rivers.
      The total quantity of soluble salts in the ocean is very great. Seawater is mainly
the solution of clorides and sulphates of sodium, magnesium and potassium; yet it
contains the appreciable amount of bromine, iodine, iron, silicon, carbonate and
phosphate. Gold, silver and radium have been found among the elements contained
in sea water.
      Biological activity is undoubtedly of great importance controlling the concentra-
tions of many of the elements in the ocean. For example, the growth of plants in the
surface layers greatly reduces the quantity of nitrates and phosphates. Yet these com-
pounds tend to accumulate in the comparatively stagnant depths. Large portion of
marine animals use phosphate and carbonate of lime to construct their shells and
bones and thus remove quantities of carbon dioxide, phosphate and lime from seawa-
ter. The calcium, carbonate and phosphate of their shells and bones are deposited on
the ocean floor.

Задание 2. Переведите следующие словосочетания на русский язык.
     А solution of salts and gases; a tremendous number of living organisms; to depo-
site near the mouths of rivers; solution of clorides and sulphates of sodium; magnesium
and potassium; to return to the ocean in the from of rain; sea water evaporates;
to contain bromine, iodine, silicon; to contain iron and carbonate; to reduce the quanti-
ty of nitrates and phosphates; to use phosphate, carbonate and lime.

Задание 3. Переведите следующие словосочетания на английский язык.
    Панцирь и кости морских животных; использовать фосфат, карбонат и из-
весть; застойные глубины; уменьшать количество нитратов и фосфатов; дву-
окись углерода; по подсчетам ученых; растворимые соли; элементы содержа-
щиеся в морской воде; панцирь и кости; бром и йод; кремний и калий; сульфат
натрия; магний и радий; оседать в устьях рек; морская вода испаряется и возвра-
щается в океан; состав морской воды.
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