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6. 9 Read and memorize the following words and word combinations:

composition - состав

property - свойство

matter - материя

change - изменение, изменять

condition - условие

alteration - изменение

level - уровень

accompany - сопутствовать

nature - природа

structure - структура

reactivity - химическая активность

descriptive - описательный

organic - органический compound - (химическое) соединение

carbon - углерод

application - применение

devote - посвящать

develop - разрабатывать, развивать

6. 10 Read the text and speak on your field of science "Chemistry": Chemistry

Chemistry is the science dealing with the composition and properties of matter, changes, the condition under which such changes take place and the alterations in energy levels which accompany them.

Chemistry is concerned with the nature of fire and the structure, of water with physical properties and chemical reactivity.

Chemistry has two main aspects: descriptive chemistry or the discovery of chemical facts, and theoretical chemistry or the formation of theories.

The broad field of chemistry may also be divided into two branches: organic chemistry and inorganic chemistry.

Organic chemistry deals with the compounds of carbon that occur in plants and animals. Inorganic chemistry is concerned with the compounds of elements other than carbon. Each of these branches of chemistry has practical and theoretical applications.

Many great scientists devoted their life to the development of chemistry: N. Bohr, M. Curie, M. V. Lomonosov, D. 1. Mendeleyev, A. M. Butlerov and many others.

Chemistry is one of the fundamental sciences. It plays an important part in the developing of biochemistry, physics, geology and many other fields of science.

6.11 Read and memorize the following words and word combinations:

knowledge - познания; знание

apply - прилагать branch - отрасль

engineering - техника

optics - оптика

astronomy - астрономия geodesy - геодезия

electricity - электричество geometry - геометрия

trigonometry - тригонометрия

calculus - исчисление determine - определять solve - решать

civilized - цивилизованный

pattern - модель

occur - иметь место, происходить

count - считать, подсчитывать

develop -развивать

elevate - поднимать

advance - успех

required - требуемый

deduction - вывод, заключение

complex - сложный

endeavor - усилие

invention - изобретение

achievement - достижение

6.12 Read the text and speak on your field of science "Mathematics": Mathematics

Mathematics can be called "the queen of knowledge". Mathematics can be applied to different branches of science: engineering, optics, astronomy, geodesy, electricity and so on.

The main branches mathematics are: geometer, trigonometry, and calculus

Mathematics is also a way of thinking. It can be used to determine whether or not an idea is true. Mathematics is used to solve all problems in the sciences, government and industry.

It is a language of symbols that is understood in all civilized countries of the world.

Mathematics can also be described as the study of the patterns. This study of patterns has been very important for science because pattern, regularity and symmetry occur quite often in nature.

Mathematics grew with the growth of civilization. One might say. However, that when man began to count, mathematics was born. It was the first of the sciences to develop formally. The Greeks elevated mathematics to the field of abstract thinking. Its higher advances have been made in computer programming. A computer can analyze the data and make the requires deductions in a short time.

Electronic computers help make complex technical calculations in many fields of endeavor. The invention of electronic computers is one of the greatest achievements of mankind.