3. Translate the following words bearing in mind the meaning of the affixes and memorize them:

to magnify (v), magnifier (n), magnification (n)

to increase (v), increase (n), increasing (adj), increasingly (adv)

to decrease (v), decrease (n)

to inspire (v), inspiration (n)

to graduate ((v), gradual (adj), gradually (adv)

to extend (v), extension (n), extensive (adj), extensively (adv)

to explore (v), explorer (n), exploration (n), explorative (adj)

vision (n), visionary (n) (adj), visibility (n), visible (adj)

to observe (v), observer (n), observatory (n), observant (adj), observance (n)

to complicate (v), complication (n)

to reflect (v), reflector (n), reflection (n), reflective (adj)

to invent (v), inventor (n), invention (n), inventive (adj)

to appear (v), appearance (n)

to disappear (v), disappearance (n)

4. Underline the prefixes in the following words and translate them:

to discover, invisible, unknown, to exclude, indifferent, unnatural, to mislead, impossible, independent, irregular, nonliving, disorder; illegal

5. State to what part of the speech the words belong and translate them into Ukrainian; form the corresponding verbs:

difference, assimilation, respiration, reproduction, organization, movement, magnification, resemblance, relation

6. Form the nouns corresponding to the following verbs:

to discover, to construct, to affect, to know, to develop, to vary, to divide, 'to differ, to resemble, to observe, to suggest, to apply, to encourage, to agree, to magnify, to appear

7. Translate the m following sentences into Ukrainian paying attention to the emphatic construction "it is... that";

1. It was the electron microscope that finally revealed them as objects that could be seen.

2. It is the absence of vitamins that brings on diseases.

3. It is very important to begin the experiment in time.

4. It is the magnifying power of lenses that made it possible to see tiny things.

5. It was Carolous Linneus who suggested the first system of classification of living things.

6. It is necessary to use only very thin objects to see them under the microscope.

7. It was the new method of investigation that helped to finish the work so successfully.

8. Anton von Leeuwenhoek was the first man who penetrated through his lenses into the world of the microscope.

8. Answer the questions:

1. Explain how a microscope is used.

2. What kinds of microscope do you know?

3. What is a compound microscope?

4. How does the electron microscope differ from the compound microscope?

5. Why are most compound microscopes more powerful than simple microscopes?

6. How will you examine an object under a compound microscope and an electron microscope? What is the difference?

7. Why can't you see cells or protoplasm when you put your finger under the microscope?

9. Read the following text and try to retell it word for word:

By examining water from a lake or stream we will find that it is full of life. If you look carefully, you may find there the simplest animal, the ameba [ə'mēbə]. It is a tiny mass of jelly usually about 1/50 of an inch long. The ameba is surrounded by a very thin cell membrane, which is quite elastic. At times, a part of the membrane will push out, forming a false foot. The rest of the ameba will then flow into it. In this way, the little animal moves slowly about in its watery world.