Read the text and tell with the help of the figure about laboratory method of obtaining oxygen. Laboratory Method of Obtaining Oxygen
A test-tube containing some mercuric oxide is clamped to a ring-stand and heated by a burner. One end of a bent glass tube is connected to the test-tube while the other reaches a cylinder turned upside-down into a bowl full of water. Soon bubbles of gas will appear. The gas is oxygen.
F
ig.
3.
Laboratory Method of Obtaining Oxygen
I—a burner; 2 — mercuric oxide; 3 — a test tube; 4 — a funnel;
5—a bent glass tube; 6—a cylinder (turned upside-down); 7— water; 8—a vessel
Unit VI
Russian Scientists Part a
Pronounce the following words:
Siberia [sai'biəriə] significance [sig'nifikəns]
gymnasium [ʤim'neizjəm] supervision [,sju:pə'viƺən]
especially [is'peʃəli] Periodic Law [,piəri'ɔdik 'lɔ:]
Pedagogical Institute contribution [,kɔntri'bju:ʃn]
[,pedə'gɔʤikəl 'institju:t] numerous ['nju:mərəs]
university [,ju:ni'və:siti] theories ['ɵiəriz]
thesis ['ɵi:sis] patriot ['peitriət]
alchohol ['ælkəhɔl] proud [praud]
theoretical [ɵiə'retikəl]
Read the following word combinations:
especially liked [is'peʃəli 'laikt]
present the work [pri'zent ðə 'wə:k]
at the age of [ət ði 'eiʤdj 'ɔv]
a new era [ə'nju: 'iərə]
physico-mathematical department ['fizikou ,mæɵi'mætikəl di'pa:tmənt]
thankful to ['ɵæŋkful tə]
Doctor of Science degree ['dɔktər əv 'saiəns di'gri:]
practical significance ['præktikəl sig'nifikəns]
Read the text and guess what scientist this text is about. Notes on the Text
1. at the age of — в возрасте
2. to grant a degree — присуждать ученую степень
3. to carry on (smth) — вести (что-л.), заниматься чем-нибудь
carry out — выполнять
Text
The great Russian chemist, was born in Siberia on February 8, 1834. When seven years old he went to gymnasium at Tobolsk. He studied, very hard, he especially liked mathematics, physics and history. At the age of 16 he entered the Pedagogical Institute in St. Petersburg, physico-mathematical department. He graduated from the Institute in 1855 and began to teach chemistry at the Technological Institute and then at the University. In 1865 he was granted the Doctor of Science degree for a thesis on the combination of alchohol with water. This work was both of great theoretical and practical significance. Soon after that the scientist was appointed Professor of General Chemistry of St. Petersburg University. Despite lectures and supervision of the laboratory the Russian chemist carried on great research work.
He stated that the properties of the elements were a periodic function of their atomic masses. He presented this work to the Russian Chemical Society and opened a new era in the history of chemistry.
The scientist was interested in many branches of science, indeed there is hardly any field of science that was not enriched by his contribution. His numerous works dealt with many subjects: properties of liquids, theories of solutions, the development of the gas law, the use of oil and many others.
He was a great patriot. He did everything for the development and progress of his country. He died in 1907.
The world is thankful to this scientist for his great contribution to the world science. At present there is hardly anybody who doesn't know this Russian. We are proud of him who did so much for his country, for the development of the world science.
Remember the following words and word combinations:
great
hard
especially
to enter the Institute to teach (taught, taught)
significance
to be appointed
despite
supervision
to suggest
to be interested in
hardly
contribution
liquid
to continue
Choose Russian equivalents from the right column:
especially
to graduate from
hardly
the very
hard
despite
to deal with
to present
to be present
представлять
именно этот
трудный
несмотря на
иметь дело, касаться
особенно
окончить
присутствовать
едва
Retell the text according to the following plan:
The childhood.
The gymnasium and the Pedagogical Institute.
The work at the Technological Institute and a University.
His research work.
The greatest discovery.
The greatest contribution to science.
A great chemist and patriot.
Make up 15 questions to the text.
Open the brackets choosing a suitable word. Translate the sentences into Russian:
Many scientists tried to classify elements (despite, according to) their atomic weights.
He worked (hardly, hard) at the new problem.
It was (very, the very) important to solve this problem in time.
They could (hard, hardly) finish their work without his supervision.
Elements with (very, the same) properties are at definite intervals in the Periodic Table.
This scientist was interested (both, both … and) in mathematics, physics.
He was very (interesting, interested) in chemistry from his childhood.