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

GAP FILL. Complete the text

Earliest, wonders, synthetic materials, discoveries, basic material, discovery, experimentation, used, compounds, elixir,

BIRTH OF CHEMISTRY


From the ____________ times men have observed striking changes that take place in nature and have made accidental ____________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___________. Glass, for example, has been known for over 3,000 years. Soap was also made in the early times. Directed _____________ 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 __________of life which could bring youth to the aged.Many important discoveries were made as a result of this search. They ________ distillation, extraction, calcinations, coagulation, etc. They prepared and studied many of the ___________ 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 _________of nature appeared.We know three long periods in the history of human progress, named after the ___________________ used - the Stone, Bronze and the Iron Age. Now we live in the age of chemistry, which produces _____________.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.
G rammar: past simple