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V. Match these word combinations with their Russian equivalents.

1) to preserve the value completely

a) работать над темой

2) practical significance

b) огромное количество

3) running the laboratory

c) свойства элементов

4) to suggest a system of classification

d) предложить систему классификации

5) great amount

e) практическая значимость

6) coal, petroleum, iron and steel industries

f) полностью сохранить значимость

7) properties of elements

g) руководство лабораторией

8) to work on a subject

h) угольная, нефтяная, металлургическая и сталелитейная отрасли промышленности

VI. Paraphrase the sentences using the synonyms from the box instead of the underlined words.

significance, resulted in, a number of,

great, considerable, research in

1. While living in Germany, Mendeleyev made some important investigations.

2. The work of Mendeleyev was of great theoretical and practical value.

3. Apart from lectures and running the laboratory Mendeleyev carried out immense research work.

4. Great number of elements were unknown at the time when Mendeleyev created his Periodic Table.

5. D. I. Mendeleyev carried out investigations into coal, petroleum, iron and steel industries in Russia.

6. The progress in chemistry led the discovery of the inert gases and the study of 14 rare Earth elements.

VII. Insert the proper prepositions. Memorize some of the expressions.

17: at (1) on (3) from (1) in (3) of (4) for (1) with (3) to (1)

1. … 1850 … the age of 16 Mendeleyev entered the Pedagogical Institute … Petersburg to study chemistry.

2. Five years later Mendeleyev graduated … the Institute … a gold medal.

3. Mendeleyev was invited to lecture … theoretical and organic chemistry … Petersburg University.

4. … 1865 Mendeleyev was awarded the Doctor of Science degree … the thesis … the combination … alcohol … water.

5. The Periodic Table of Elements consists … vertical groups and horizontal periods.

6. The main idea of the Periodic System is a periodic repetition … the properties of elements … the increase of their atomic weights.

7. When working … the subject, Mendeleyev analyzed a great amount … literature.

VIII. Match the words in column a with their definitions in column b. Define the part of speech the words in column a belong to.

A

B

1) determine

a) totally

2) increase

b) to find something out

3) property

c) to say in advance that something will happen

4) predict

d) a natural quality of something

5) considerable

e) the usefulness or importance of something

6) completely

f) a rise in amount, number, or degree

7) value

g) fairly large