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9. Open the brackets choosing the correct form of the Participles. Translate the sentences into Ukrainian:

l. A positively (charging, charged) particle having the mass.

2. The scientist found that X-rays (producing, produced) were complex.

3. Oppositely (charging, charged) particles exert forces of attraction on one another.

4. The work (doing, done) by these research-workers resulted in many new discoveries.

5. The investigation (following, followed) by many experiments was of great importance.

6. The nuclei (forming, formed) in this reaction are unstable.

7. When (working, worked) in the lab the students carried out many experiments.

8. The student (translating, translated) the article knows English very well.

9. When (heating, having heated) this substance one should be very careful.

10. (Investigated, having investigated, Investigating) all the properties of new water, they could understand, the mystery of silvery clouds.

11. The (dissolving, dissolved, having dissolved) materials may be soluble solids, liquids or gases.

12. Later (using, used, having used) in steam boilers, should be free from substances that cause corrosion.

10. Use the following sentences in all the forms and tenses adding suitable adverbial modifiers where necessary:

1. People employ glass for many purposes.

2. Stainless steel is widely used in chemical machinery.

3. Pumps find many applications in the chemical process industries.

4. A crusher is a machine designed to reduce large rocks.

11. Translate into Ukrainian paying attention to the word "for":

1. Our age is called the age of atom, for we use the atom for various purposes.

2. For a long time scientists were not able to discover the secret of the atom.

3. Hydrogen is widely used for it contains a large amount of chemical energy.

12. Pick up the key words from the text “Crushers”. Make up your own sentences with them.

13. Write an abstract to the text “Crushers”.

14. Get ready for presenting the topic “Crushers” at the conference ”Innovations in Science and Engineering” based on the following questions of Task 4.

LESSON 9

1. Read and memorize the following words:

attrition

тертя

mortar

ступа

pestle

пест

dispersibility

дисперсність

uniformity

однорідність, рівномірність

exposure

вплив

trench

прорізати

grain

частинка

mining

гірнича справа

feldspar

шпат

cinder

шлак

dolomite

осадкова карбонатна гірська порода

lignite

буре вугілля

bentonite

бентонітова глина

shale

сланець

carborundum

карбід

fineness

тонкість подрібнення

limestone

вапняк

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