The Russian scientist Mikhail Vasilievich Lomonosov was born in 1711, in the village of Denisovka near the town of Kholmogory, Archangelsk province, to the family of a fisherman. Taught to read and write by the literate fellow-villager, Lomonosov had soon read all the books he could obtain in his village. At the age of 19 he left his native village, and made his way to Moscow. In Moscow he succeeded to enter the Slav-Greek-Latin Academy, the only higher educational institution in Moscow at that time. Neither the conditions of work nor material difficulties discouraged young Lomonosov. His brilliant capabilities and hard word enabled him to complete the seven-grade curriculum of the Academy in four years. Lomonosov did not finish the last grade, as he was transferred together with eleven others of the best pupils to Petersburg to study at the University of the Academy of Sciences. Less than a year after he came to Petersburg Lomonosov was sent abroad to study metallurgy and mining. In 1741, after his return to Russia Lomonosov was appointed Adjunct of the Academy in the class of physics and soon became a professor in chemistry and a full member of the Russian Academy of Sciences. His tireless scientific and practical activities were striking for their breadth and diversity. Among the numerous discoveries of Lomonosov is the Law of Conservation of Mass. This is the fundamental law of chemical change of substance formulated as follows: The mass of a body remains unchanged by any physical or chemical change to which it may be subjected. Lomonosov developed a corpuscular theory of the structure of substance in which he anticipated the present-day theory of atoms and molecules. Lomonosov considered chemistry his “main profession”, but he was at the same time the first outstanding Russian physicist. He constantly emphasized the necessity of a close connection between chemistry and physics. He said that chemical phenomena could be treated correctly only on the basis of physical laws. Lomonosov was not only talented scientist, but a materialist philosopher as well. Examining the phenomena of nature, he came to the materialistic conclusion on the fundamental question of philosophy – that of the relation of thought to being. He gave all his energy to the promotion of Russian science. In 1755 Moscow University was founded thanks to the efforts and after the project of Lomonosov. This university became a major centre of Russian enlightenment and science. Lomonosov died in 1765, at the age of 54. Find in the text words formed from the same root as the following words: fish, connect, physics, light, cover, difficult, education, examine, act, tire