Question

Variant 3 Завдання 1 Вставте у пропуски дані слова за змістом, щоб утворився текст. Chemistry The chemistry involves a systematic study of the substances of the universe, of their 1 and their reactions with each other to form new with different properties and of conditions governing those reactions. Chemistry is also concerned with the 2 of data it has acquired and with a series of precise generalizations called laws. Chemistry is not concerned only with the 3 of laws. Its aim is to find the simplest 4 7 of these laws. It is to invent a 5 1 which makes clear the relationship between one law and another. A number of theories 6 in chemistry. They are - the atomic theory, the kinetic theory, the ionic theory and the theory of 7 4 There is an important feature of 8 theories They should provide an explanation of 9 already known They should also lead to a further advance in our 10 . 1. theory 2. knowledge 3. discovery 4. valency 5. are encountered 6. properties 7. classification 8. facts 9. explanation 10. scientific

Answer 1

1. properties

2. classification

3. discovery

4. explanation

5. theory

6. are encountered

7. valency

8. scientific

9. facts

10. knowledge

Answer 2

Chemistry involves a systematic study of the substances of the universe, of their properties and their reactions with each other to form new ones with different properties and of conditions governing those reactions. Chemistry is also concerned with the classification of data it has acquired and with a series of precise generalizations called laws. Chemistry is not concerned only with the discovery of laws. Its aim is to find the simplest explanation of these laws. It is to invent a theory which makes clear the relationship between one law and another. A number of theories are encountered in chemistry. They are - the atomic theory, the kinetic theory, the ionic theory, and the theory of valency. There is an important feature of scientific theories. They should provide an explanation of facts already known. They should also lead to a further advance in our knowledge.