Vocabulary. 5.1 Give English equivalents of the following words and word combinations:

5.1 Give English equivalents of the following words and word combinations:

иметь дело (рассматривать); состав; свойства вещества; условия; иметь место (происходить); природа огня; важная роль; развитие; два главных аспекта; ветвь (отрасль); древние времена; бронза; железо; современная химия; зависимость; внешнее давление; предполагать; структурная теория; величайшее открытие; периодическая таблица элементов; посвятить свою жизнь; делать вклад; воспринимать как должное.

5.2 Match the parts of the sentences:

1. Chemistry is the science dealing with	a) to ancient times.
2. Chemistry is concerned with	b) descriptive chemistry and theoretical chemistry.
3. Chemistry has two main aspects:	c) the greatest discovery in the sphere of chemistry.
4. Chemistry’s origin goes back	d) with the work of Robert Boyle.
5. In the 17^th century modern chemistry began	e) the composition and properties of matter.
6. In 1869 D.I. Mendeleyev made	f) the nature of fire and the structure of water.

5.3 Complete the sentences:

1. Chemistry is the science dealing with …

2. A chemical change is a change …

3. Chemistry is concerned with …

4. It plays an important part in the development of …

5. Chemistry's origin goes back to …

6. Robert Boyle was the first to study …

7. D.I. Mendeleyev observed certain patterns and regularities in the …

8. Academician N.N. Semenov has made great discoveries in the …

5.4 Fill in the gaps with the words and word combinations from the text:

1. Chemistry deals with …, … and crystal structure.

2. Chemistry is one of the … sciences.

3. The broad field of chemistry may be divided into two …: … chemistry and … chemistry.

4. Organic chemistry deals with the compounds of … that occur in plants and animals.

5. In 1869 D.I. Mendeleyev made … … in the sphere of chemistry.

6. The achievements in chemistry made it necessary to … the Periodic Table.

7. In the last few decades 11 new … … were obtained.

8. Many great … devoted their lives to the development of chemistry.

9. A group of researchers has evolved a new method of … phenol and aceton from benzene and propylene.

Дата добавления: 2015-08-03