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
1. properties
2. classification
3. discovery
4. explanation
5. theory
6. are encountered
7. valency
8. scientific
9. facts
10. knowledge