VII. Insert prepositions.

1. Carbon is known to occur … two crystalline forms which differ strikingly in their properties.

2. … present our scientists are introducing synthetic diamonds into the country national economy on a wide scale.

3. The principle compound … carbon and oxygen is carbon dioxide CO2.

4. Diamond is a colourless and transparent substance, the hardest … known substances, a non – conductor of electricity.

5. Each carbon atom … graphite has three nearest neighbours, all in its own plane.    

XVIII. Translate the following sentences:

1. Углерод обычно находится в связанном состоянии в природе.

2. Алмаз является самым твердым из веществ, которые мы знаем.

3. Углерод находится в природе в двух кристаллических формах.

4. На воздухе графит не загорается даже при сильном накаливании, но легко сгорает в чистом кислороде.

5. С кислородом углерод образует диоксид углерода СО2.

XIX. Divide the text into some parts and name them.

XX. Answer the questions.

1. What state does carbon occur in nature in?

2. What distinct forms of carbon do you know?

3. What is the third form of elementary carbon?

4. How can you obtain amorphous carbon?

5. What is diamond?

6. What is the main property of diamond?

7. What can you say about physical properties of graphite?

8. Where is graphite used?

 

XXI. Retell the text.

Lesson VII

Water

 

Word - formation: Suffixes of adjectives -al, -ic

Grammar: Participle I

Text: Water

Assignments to do:

Remember:

Suffixes ic, -al form adjectives from nouns:

person - лицо, personal - личный

history – история, historical - исторический

base – основание, basic - основной

 

 I. Read and translate the following words:

central, experimental, academic, electric, historical, monumental, hopeful, beautiful, practical, social, usual.

Remind Grammar (look at grammar reference)

 II. Answer the questions.

1. How many Participles are there in the English grammar?

2. How is Present Participle formed?

3. How is it translated into Russian?

 

III. Give Participle forms from the following verbs:

to receive, to hospitalize, to administer, to indicate, to examine, to admit, to allow;

IV. Read and translate the following sentences into Russian:

1. Living in the hotel we always help each other with our homework.

2. The girl playing the piano is my sister.

3. Going home in the evening I always meet this girl.

4. Reading much every day he learns a lot of new words.

5. Knowing English well, he translated the article.

 

 V. Fill in the gaps with the proper verbs in brackets (dripping, mixing, examining, being carried).

1. I spent a lot of time …these liquids.

2. …taps must be repaired.

3. The …teacher is in Room 15.

4. The experiment …out in our laboratory deals with the properties of inert  

     gases.    

 

VI. Translate the following sentences into English:

1. Человек, осматривающий больного, - наш врач.

2. Осматривая больного, врач прослушал ему сердце.

3. Врач стоял возле больного, внимательно осматривая его.

VII. Read and memorize the following words:

distribute                      распределять

aggregation                      собирание, масса

cloud                                     облака, туча

condense                           конденсировать

vital                                   жизненный, жизненно важный

nutrition                            питание, пища

germ                                   микроб

passage                              прохождение

continual                           непрерывный

pass over                           дистиллироваться

fine                                    тонкий

  VIII. Write the following words in the plural:

water, snow, germ, tube, liquid, animal, country, body, specialist, laboratory.

 

IX. Give antonyms to the following words:

compound, pure, liquid, invisible, small, cold, high, known.

 X. Name Indefinite forms at the following verbs:

distributed, knew, boiled, called, was, distilled, put, condensed, got.

 

 XI. Read and translate into Russian the following derivates:

to condense – condenser – condensation

to distribute – distribution – distributor