II. Match the words on the right with their definitions on the left

1)refrigeration	a) heating a liquid to particular temperature and then cool it, in order to kill harmful bacteria
2) irradiation	b) preserving food in vinegar or salt water
3) pickling	c) making food cold in order to keep it fresh or preserve it
4) pasteurizing	d) treating food with radioactive gases in, order to preserve it
5) Technology	e) to make smth free from bacteria
6) to sterilize	f) the simplest and smallest forms of plant life which are often a cause of disease
7) Bacteria	g) putting the food into a metal or plastic container for preserving
8) canning	h) the action of keeping smth in its original state or in good condition
9) Preservation	i) the application of the scientific study to practical tasks in industry

III. Find the English equivalents for the following Russian words.

Выживание, человек, часто используемый, засолка, брожение, замедлять, болезнетворный, разрушать, катализатор, хрупкий, портить, уничтожать.

IV. Read the text once again and define if the following sentences are true (T) or false (F).

T	F
		Food preservation is one of the oldest technologies used by human beings.
		The article describes how to preserve different food.
		There exist two aims of food preservation processes.
		An enzyme is a protein.
		Enzyms are very strong.
		Sterile food contains a lot of bacteria.
		Milk can be fresh for about two weeks.