Amaliy mashg’ulotlar mazmuni (pre-intermidiate) Lesson Read and translate the text. Uzbekistan

3. Complete the sentences with in, on or at and a time expression.
In my country/town ...

1. 
   the most popular time to get married is ...
   
2. 
   people usually have dinner ...
   
3. 
   most people go on holiday ...
   
4. 
   the best time to go shopping is ...
   
5. 
   the best programmes on TV are ...
   
6. 
   the roads are really busy ...
   

Lesson 16. Introduction to chemistry.
Birth of Chemistry Voc: Verb collacatios (introduction to chemistry) Gr: Past Simple;S:Discussing friendship.Conversation:My best friend.
BIRTH OF CHEMISTRY



From the earliest times men have observed striking changes that take place in nature and have made accidental discoveries of great value. Many of substances used today, which arc prepared by chemical methods, were known to the ancients, but there are no historical records of their discovery. Glass, for example, has been known for over 3,000 years. Soap was also made in the early times.
Directed experimentation appeared with the use of alchemy. The alchemists sought things which were supposed to lead to happiness, health and riches. They wanted to change the common metals into gold and to find the elixir of life which could bring youth to the aged.
Many important discoveries were made as a result of this search. They used distillation, extraction, calcinations, coagulation, etc. They prepared and studied many of the compounds which are used in chemical work. But selfish motive that guided the alchemists could not lead to the development of science.Chemistry was born as a science only when man’s desire to learn the truth about the wonders of nature appeared.We know three long periods in the history of human progress, named after the basic material used - the Stone, Bronze and the Iron Age. Now we live in the age of chemistry, which produces synthetic materials.Due to the great discoveries of the past few decades we are able to go over to a new age - the age of synthetic polymers. Synthetic materials will play a still more important part in future.

1.